Department of Obstetrics and Gynecology, Bugando Medical Centre, Catholic University of Health and Allied Sciences, Mwanza, United Republic of Tanzania
Background: Meconium stained amniotic fluid occurs in up to 20% of all deliveries and is reported to vary in different settings across the world. Babies delivered by these women are at high risk of low score and meconium aspiration syndrome. Limited studies have reported on the predictors for poor fetal outcomes in women presenting with meconium stained amniotic fluid. Methods: This was a cross sectional study involving 209 pregnant women with meconium stained amniotic fluid. Semi structured questionnaire was used for data collection. Data were analyzed using STATA version 12. Results: A total of 1202 women delivered during the study period from December 2017 to February 2018. Amongst, 209 (17.4%) women had meconium stained amniotic fluid. Of the 209 babies, 35 (16.7%) had low score, 41 (19.6%) were admitted due to meconium aspiration syndrome and 3 (1.4%) died due to meconium aspiration syndrome related complications. Predictors for poor fetal outcomes were found to be Thick meconium (Grade III), Meconium as a new event during labor monitoring and null parity. Conclusion: The prevalence of meconium stained amniotic fluid at Bugando Medical Centre was found to be 17.4%. Thick meconium, development of meconium as a new event and nullparous were found to predict for poor fetal outcomes. Immediate interventions are recommended for those with the identified predictors for poor fetal outcome.
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Meconium Stained, Fetal Outcomes, Women Delivering, Amniotic Fluid
1. Introduction
Meconium stained amniotic fluid (MSAF) can occur in up to 20% of all deliveries
[1]
Sori D, Belete A, Wolde M. Meconium Stained Amniotic Fluid: Factors affecting Maternal and Perinatal Outcomes at Jimma University Specialized Teaching Hospital, South West Ethiopia. GynecolObstet (Sunnyvale). 2016; 6(394): 2161-0932.1000394.
[2]
Mundhra R, Agarwal M. Fetal outcome in meconium stained deliveries. Journal of clinical and diagnostic research: JCDR. 2013; 7(12): 2874.
[3]
David A, Njokanma O, Iroha E. Incidence of and factors associated with meconium staining of the amniotic fluid in a Nigerian University Teaching Hospital. Journal of obstetrics and gynaecology. 2006; 26(6): 518-20.
[4]
Oyelese Y, Culin A, Ananth CV, Kaminsky LM, Vintzileos A, Smulian JC. Meconium-stained amniotic fluid across gestation and neonatal acid-base status. Obstetrics & Gynecology. 2006; 108(2): 345-9.
[1-4]
. The tendency to pass meconium increases with gestation age and is more marked at 40 weeks and above
[2]
Mundhra R, Agarwal M. Fetal outcome in meconium stained deliveries. Journal of clinical and diagnostic research: JCDR. 2013; 7(12): 2874.
[2]
. Passage of meconium in utero in most of cases is physiological, though for few may be a sign of fetal compromise. Fetuses may pass meconium in utero because of physiological maturation of the gastrointestinal tract or sometimes can be due to pathologic events like hypoxia posing a great dilemma in managing these women
[5]
Klingner MC, Kruse J. Meconium aspiration syndrome: pathophysiology and prevention. The Journal of the American Board of Family Practice. 1999; 12(6): 450-66.
[5]
. In the settings where there is no electronic fetal monitor or inadequate staff to provide close monitoring of laboring women, the rate of caesarian section in this group of women is very high
[1]
Sori D, Belete A, Wolde M. Meconium Stained Amniotic Fluid: Factors affecting Maternal and Perinatal Outcomes at Jimma University Specialized Teaching Hospital, South West Ethiopia. GynecolObstet (Sunnyvale). 2016; 6(394): 2161-0932.1000394.
[1]
. Meconium stained amniotic fluid is associated with poor birth outcomes such as low APGAR score, need for resuscitation, meconium aspiration syndrome, increased hospital stays, and neurodevelopment delays
[2]
Mundhra R, Agarwal M. Fetal outcome in meconium stained deliveries. Journal of clinical and diagnostic research: JCDR. 2013; 7(12): 2874.
[6]
Wiswell TE, Gannon CM, Jacob J, Goldsmith L, Szyld E, Weiss K, et al. Delivery room management of the apparently vigorous meconium-stained neonate: results of the multicenter, international collaborative trial. Pediatrics. 2000; 105(1): 1-7.
[7]
Osava RH, Silva FMBd, Oliveira SMJVd, Tuesta EF, AmaralMCEd. Meconium-stained amniotic fluid and maternal and neonatal factors associated. Revista de saudepublica. 2012; 46(6): 1023-9.
[2, 6, 7]
. Bugando Medical Center have a significant number of women with meconium stained amniotic fluid but the magnitude and fetal outcomes are yet to be documented. Neither amnioinfusion nor electronic monitors are in place for these women at BMC as recommended by most studies
[8]
Hofmeyr GJ, Xu H. Amnioinfusion for meconium-stained liquor in labour. Cochrane Database Syst Rev. 2010; 1.
[9]
Fraser WD, Hofmeyr J, Lede R, Faron G, Alexander S, Goffinet F, et al. Amnioinfusion for the prevention of the meconium aspiration syndrome. New England Journal of Medicine. 2005; 353(9): 909-17.
[8, 9]
. As a way forward to improve outcomes in this group of patients, it was important to conduct a study to establish the magnitude and predictors for poor fetal outcomes among women presenting with meconium stained amniotic fluid at Bugando Medical Center.
2. Material and Methods
2.1. Study Design
A prospective cross-sectional design was used involving all women delivering at Bugando Medical Center from December 2017 to February 2018. Women with meconium stained amniotic fluid during a study period were selected to participate in the study.
2.2. Study Area and Setting
The study was conducted at BMC, BMC is a tertiary referral, consultant, and teaching Hospital in the Lake and Western zones of the United Republic of Tanzania. It is located along the shores of Lake Victoria in the City of Mwanza. BMC has 950 beds and 1500 employees. It is a referral hospital with various specializations.
2.3. Sampling Strategy and Sample Size
The participants were selected at the labor ward from December 2017 to February 2018, the inclusion criteria for participation were patient with Meconium stained amniotic fluid, adequate mental capacity and the ability and willingness to participate. A total of 209 women with meconium stained amniotic fluid were purposively selected from December 2017 to February 2018. The patients were managed according to the BMC management protocol for meconium stained amniotic fluid, which includes fluids resuscitation with ringer’s lactate and continue monitoring for progress of labor if there is no indication for caesarian section. Women who were admitted for other reasons not labor pain were excluded from the study.
2.4. Data Collection
A semi structured questionnaire was used to select data from all women with meconium. After clinical assessment participants were monitored for progress of labor/instituted management according to the diagnosis made. Obstetric findings like cervical dilatation, time when meconium, grade of meconium and fetal outcomes were noted. All clinical information for each participant was recorded.
2.5. Data Analysis
All data were entered into the computer Microsoft excel 2007 and later transported to STATA version 12 for analysis. All deliveries during the study period were taken for calculation of prevalence of meconium stained amniotic fluid. Fetal outcomes were analyzed as proportional where as continuous variables were analyzed using mean. All independent variables were exposed to univariate logistic regression model and those with p value of 0.05 or less including age were exposed to multivariate logistic regression model. Independent variable with p value of less than 0.05 was considered a predictor for low score and or meconium aspiration syndrome.
2.6. Ethical Consideration
Ethical clearance for this study was sought from the Catholic University of Health and Allied Sciences (CUHAS)/Bugando Medical Centre (BMC) Joint Research and Ethical committee. Authorization to conduct the research was sought from the Director General and from the head of department of obstetrics and gynecology. Participants were asked to sign a written informed consent form before joining the study.
3. Results
3.1. Socio-Demographic Characteristics of Women Who Had Meconium Stained Amniotic Fluid
The participants characteristics are presented in the Table 1 below. The mean age of women with meconium stained amniotic fluid was 27 ± 5 years and the mean gestation age was 40 ± 2weeks. Of the 209, 18 (8.4%) were the age between 16-20, 143 (684%) were 21-30, 46 (22.2%) were 31-40 and 2 (1%) were age between 41-43. Among them 196 (93.8%) were direct from home and 13 (6.2%) were referral from another facilities. Multigravida account for the highest number of patients, 134 (64.1%), followed by Primegravidawhich account of 59 (28.2%). The parity of the participants wasnullipara 62 (29.7%), Primepara 57 (27.3%), Multipara 87 (41.6%), Grandmultipara 16 (7.7%), and participants gestation age wasPreterm 20 (9.9%), Early term 30 (14.4%), Full term 93 (44.4%) andLate term 66 (31.6%).
Table 1. Distribution of socio-demographic characteristics of the study participants.
Patients’ characteristics
Number (n)
Percentage (%)
Age group in years
16 – 20
18
8.4
21 – 30
143
68.4
31 – 40
46
22.2
41 – 43
2
1.0
Type of admission
Direct from home
196
93.8
From another facility
13
6.2
Gravidity
Primegravida
59
28.2
Multigravida
134
64.1
Grandmultigravida
16
7.7
Parity
Nullpara
62
29.7
Primepara
57
27.3
Multipara
87
41.6
Grandmultipara
3
1.4
Gestation age
Preterm
20
9.6
Early term
30
14.4
Full term
93
44.4
Late term
66
31.6
3.2. Clinical Information of Women with Meconium Stained Amniotic Fluid
Majority, (83.7%) of women with meconium stained amniotic fluid presented in active phase of labor and a significant number delivered few minutes after admission. Diagnosis of meconium stained amniotic fluid was made after artificial rupture of membrane in most of patients and the cervical dilatation was more than 6 in 76.6% for those artificially ruptured the membrane (Table 2).
Table 2. Clinical information of women who had meconium stained amniotic fluid.
Patient clinical characteristics
Number (n)
Percentage (%)
Stage/phase of labor on admission
Latent phase
13
6.2
Active phase
175
83.7
Second stage
21
10.1
Grade of meconium
Mild
63
30.1
Moderate
103
49.3
Thick
43
2.6
When was meconium noted
On admission
37
17.7
Artificial rupture of membrane
137
65.5
New event during labor monitoring
35
16.8
Cervical dilatation when meconium was noted (cm)
2-4
32
15.3
5-6
49
23.5
7-9
105
50.2
10
23
11.0
Duration of labor (hours)
≤3
102
48.8
4-8
98
46.9
>8
9
4.3
Labor induction
Yes
197
94.3
No
12
5.7
Labor augmented
Yes
14
6.7
No
195
93.3
Model of delivery
spontaneous vaginal delivery
144
68.9
Caesarean section
65
31.1
3.3. Fetal Outcome for Women Who Had Meconium Stained Amniotic Fluid
Of the 209 babies, 56 (26.8%) and 35 (16.7%) had low score in their first and fifth minute of life respectively. On the other hand, 41 (19.6%) babies were admitted due to meconium aspiration syndrome and 3 (1.4%) of them died. There was no still birth (Table 3).
Table 3. Fetal outcome for women who had meconium stained amniotic fluid.
Babies’ clinical characteristics
Number (n)
Percent (%)
First minute APGAR score
Low score
56
26.8
Normal score
153
73.2
Five-minute APGAR score
Low score
35
16.7
Normal score
174
83.2
Outcome of babies
Healthy babies
160
76.6
Meconium aspiration syndrome
41
19.6
Birth asphyxia
5
2.4
Death related to MAS
3
1.4
Hospital stay beyond seven days
0
0.0
3.4. Predictors for Fetal Outcomes
On univariate analysis primeparous (OR 2.2; 95% CI [1.0 – 4.9]; p-value = 0.047), thick (grade III) meconium (OR 5.3; 95% CI [1.0 – 2.3]; p-value <0.001), meconium as a new event during labor monitoring (OR 3.5; 95% CI [1.3 – 9.0]; p-value 0.011), latent phase of labor (OR 3.5; 95% CI [1.1 – 11.3]; p-value = 0.032) and caesarian section (OR 1.9; 95% CI [1.0 – 3.5]; p-value = 0.039) were statistically significant for low score and meconium aspiration syndrome. When these factors were exposed to multivariate analysis, Thick (grade III) meconium (OR 4.5; 95% CI [1.7 – 11.7]; p value 0.002), Meconium as a new event during labor monitoring (OR 4; 95% CI [1.3 – 12.4]; p-value = 0.015) and null parity (OR 4; 95% CI 2.5[1.0-6.5]; p-value = 0.047) remained statistically significant as predictors for low score and meconium aspiration syndrome (Table 4).
Table 4. Predictors for poor fetal outcomes among patient presented with meconium stained amniotic fluid.
Patient characteristics
Child health
Univariate
Multivariate
Poorn (%)
Goodn (%)
OR [95% CI]
p-value
OR [95% CI]
p-value
Age group
16-20
4(22.2)
14(77.8)
1.0
21-34
61(36.1)
108(63.9)
2[0.6-6]
0.247
2.2[0.6-8.4]
0.251
≥35
4(18.2)
18(81.8)
0.7[0.2-3.1]
0.751
1.1[0.2-6.9]
0.922
Type of admission
From Home
65(33.2)
131(66.8)
1.0
Referral
4(30.8)
9(69.2)
0.9[0.3-3]
0.859
-
-
Gravidity
Prime
22(37.3)
37(62.7)
1.0
Multigravidae
42(31.3)
92(68.7)
0.8[0.4-1.5]
0.420
-
-
Grandmultigravida
5(31.0)
11(67.0)
0.8[0.2-2.5]
0.656
-
-
Parity
Prime para
14(24.6)
43(75.4)
1.0
-
-
Null para
26(42.0)
36(58.1)
2.2[1.0-4.9]
0.047
2.5[1.0-6.5]
0.047
Multipara
29(32.2)
61(67.8)
1.5[0.7-3.1]
0.321
1.5[0.6-3.7]
0.341
Gestation age
Preterm
7(35.0)
13(65.0)
1.0
Early term
10(33.3)
20(66.7)
0.9[0.3-3.1]
0.903
-
-
Full term
26(28.0)
67(72.0)
0.7[0.2-2.0]
0.531
-
-
Late term
26(39.4)
40(60.6)
1.2[0.4-3.4]
0.724
-
-
Anemia
With anemia
43(29.0)
105(71.0)
1.0
Without anemia
26(42.6)
35(57.4)
1.8[1-3.4]
0.059
-
-
Grade of meconium
I
13(20.6)
50(79.4)
1.0
II
30(30.0)
72(70.0)
1.7[0.8-3.5]
0.182
1.5[0.7-3.6]
0.628
III
25(58.1)
18(41.9)
5.3[2.3-12.6]
<0.001
4.5[1.7-11.7]
0.002
Time when Meconium was noted
On admission
11(29.7)
26(70.3)
1.0
Artificial rupture of membrane
37(27.0)
100(73.0)
0.9[0.4-1.9]
0.742
0.7[0.3-2.0]
0.628
New event
21(60.0)
14(40.0)
3.5[1.3-9]
0.011
4[1.3-12.4]
0.015
Stage of labor
Active-second
61(31.1)
135(68.5)
1.0
Latent
8(61.5)
5(38.5)
5[1.1-11.3]
0.022
3.0[0.9-12]
0.083
Labor induction
Induced
4(33.3)
8(66.7)
1.0
Not induced
65(33)
132(67.0)
0.5[0.3-3.4]
0.981
-
-
Labor Augmented
Yes
7(50.0)
7(50.0)
1.0
No
62(31.8)
133(68.2)
1.0[0.2-1.2]
0.170
-
-
Model of delivery
SVD
41(28.5)
103(71.5)
1.0
C/S
28(43.1)
37(56.9)
1.9[1-3.5]
0.039
1.5[0.7-3.2]
0.339
Cervical dilatation when meconium noted
7[5.5–8.0]
7[6.0-8.0]
1.0[0.8-1.1]
0.583
-
-
4. Discussion
Prevalence of meconium stained amniotic fluid.
The prevalence of meconium stained amniotic fluid was found to be 17.4% [95% CI: 15.2% - 19.5%slightly higher compared to the study done in Ethiopia where they noted the prevalence to 15.4%
[1]
Sori D, Belete A, Wolde M. Meconium Stained Amniotic Fluid: Factors affecting Maternal and Perinatal Outcomes at Jimma University Specialized Teaching Hospital, South West Ethiopia. GynecolObstet (Sunnyvale). 2016; 6(394): 2161-0932.1000394.
[1]
. Studies from different parts of the world show a great variation regarding the prevalence of meconium stained amniotic fluid. Studies from, India, Brazil and London reported the prevalence of 9.8%, 11.9% and 16.5% respectively which is lower than that of the present study
[7]
Osava RH, Silva FMBd, Oliveira SMJVd, Tuesta EF, AmaralMCEd. Meconium-stained amniotic fluid and maternal and neonatal factors associated. Revista de saudepublica. 2012; 46(6): 1023-9.
[10]
Firdaus U, Ali SM. Maternal and neonatal factors associated with meconium stained amniotic fluid. Current Pediatric Research. 2013; 17(1).
[16]
Balchin I, Whittaker JC, Lamont RF, Steer PJ. Maternal and fetal characteristics associated with meconium-stained amniotic fluid. Obstetrics & Gynecology. 2011; 117(4): 828-35.
[7, 10, 16]
. In the current study, the mean gestation age was 40±2weeks higher than the mean age in the studies reported above. This high gestation age may explain the high prevalence of meconium stained amniotic fluid in the current study. A mature gastrointestinal tract will allow movement of its contents with the aid of peristaltic waves to propel intestinal contents to the rectum and once it is full sensation to defecate is stimulated and the fetus empties the rectum. Several studies have reported that the tendency to pass meconium in-utero increase with increasing gestation age
[4]
Oyelese Y, Culin A, Ananth CV, Kaminsky LM, Vintzileos A, Smulian JC. Meconium-stained amniotic fluid across gestation and neonatal acid-base status. Obstetrics & Gynecology. 2006; 108(2): 345-9.
[15]
Ashfaq F, Shah A. Effect of amnioinfusion for meconium stained amniotic fluid on perinatal outcome. JOURNAL-PAKISTAN MEDICAL ASSOCIATION. 2004; 54(6): 322-4.
[16]
Balchin I, Whittaker JC, Lamont RF, Steer PJ. Maternal and fetal characteristics associated with meconium-stained amniotic fluid. Obstetrics & Gynecology. 2011; 117(4): 828-35.
[4, 15, 16]
. Furthermore, 48.8% patients in our study presented with advanced stage of labor and upon rupturing membrane delivery took place in less than 2 hours. This may mean that labor started at home and no close monitoring of labor progress to early identify fetal compromise that lead to meconium passage. Stress that may be due to intermittent cord compression or chronic hypoxia may trigger release of catecholamine that simulates parasympathetic system of the fetus leading to utero passage of meconium
[14]
Ahanya SN, Lakshmanan J, Morgan BL, Ross MG. Meconium passage in utero: mechanisms, consequences, and management. Obstetrical & gynecological survey. 2005; 60(1): 45-56.
[14]
. A study on meconium stained amniotic fluid as a function of duration labor was done at Seoul National University College of Medicine, Korea reported prevalence of MSAF of 2.8% in patient who delivered by elective caesarian section compared to 23% for patient who delivered after the onset of labor. They also noted that, the longer the duration of labor the greater the frequency of MSAF
[17]
Lee KA, Mi lee S, Jin Yang H, Park C-W, Mazaki-Tovi S, Hyun Yoon B, et al. The frequency of meconium-stained amniotic fluid increases as a function of the duration of labor. The Journal of Maternal-Fetal & Neonatal Medicine. 2011; 24(7): 880-5.
[17]
. Further explanation for the variation of prevalence of meconium stained amniotic fluid may be related to the diagnostic means for meconium stained amniotic fluid. In most case this is by observation, that is, observer dependent. For this reason, there may be overestimation or underestimation of slight meconium.
Fetal outcomes.
In our study, 160 (76.6%) babies had good heath, 35 (16.7) had low score, 41 (19.9%) got meconium aspiration syndrome, 5 (2.4%) 3.8% got birth asphyxia and 3 (1.4%) died of meconium aspiration syndrome related complications. A similar study done 6 years ago at Gandhi Regional Institute of Health and Medical Sciences, India reported 21.2% of low apgar score, increased incidence of birth asphyxia, and a 5% rate of meconium aspiration syndrome for deliveries complicated with meconium stained amniotic fluid
[2]
Mundhra R, Agarwal M. Fetal outcome in meconium stained deliveries. Journal of clinical and diagnostic research: JCDR. 2013; 7(12): 2874.
[2]
. Many other studies across the world have reported similar outcomes among women whose delivery is complicated by meconium stained amniotic fluid
[7]
Osava RH, Silva FMBd, Oliveira SMJVd, Tuesta EF, AmaralMCEd. Meconium-stained amniotic fluid and maternal and neonatal factors associated. Revista de saudepublica. 2012; 46(6): 1023-9.
[12]
Asnani M, Singh S, Srivastava K, Gupta HP, Mittal A. Role of amnioinfusion in meconium stained liquor in relation to fetal outcome. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 2016; 5(1): 175-81.
[16]
Balchin I, Whittaker JC, Lamont RF, Steer PJ. Maternal and fetal characteristics associated with meconium-stained amniotic fluid. Obstetrics & Gynecology. 2011; 117(4): 828-35.
[24]
Samiyappa DP, Ghose S, John LB, Samal R. Maternal and perinatal outcome in meconium stained amniotic fluid at term: a case control study. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 2016; 5(10): 3404-10.
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Khatun MHA, Arzu J, Haque E, Kamal M, Al Mamun MA, Khan MFH, et al. Fetal outcome in deliveries with meconium stained liquor. Bangladesh Journal of Child Health. 2009; 33(2): 41-5.
[7, 12, 16, 24, 25]
. In most cases as also shown in the current study passage of meconium in utero is a physiological phenomenon; however, few fetuses can pass meconium as a result of compromise leading to poor fetal outcomes as demonstrated in the current study. Meconium aspiration, one of the complications of meconium stained amniotic fluid contribute high in perinatal morbidity and mortality
[11]
Dargaville PA, Copnell B. The epidemiology of meconium aspiration syndrome: incidence, risk factors, therapies, and outcome. Pediatrics. 2006; 117(5): 1712-21.
[12]
Asnani M, Singh S, Srivastava K, Gupta HP, Mittal A. Role of amnioinfusion in meconium stained liquor in relation to fetal outcome. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 2016; 5(1): 175-81.
[13]
Matthews TG, Warshaw JB. Relevance of the gestational age distribution of meconium passage in utero. Pediatrics. 1979; 64(1): 30-1.
[14]
Ahanya SN, Lakshmanan J, Morgan BL, Ross MG. Meconium passage in utero: mechanisms, consequences, and management. Obstetrical & gynecological survey. 2005; 60(1): 45-56.
[15]
Ashfaq F, Shah A. Effect of amnioinfusion for meconium stained amniotic fluid on perinatal outcome. JOURNAL-PAKISTAN MEDICAL ASSOCIATION. 2004; 54(6): 322-4.
[16]
Balchin I, Whittaker JC, Lamont RF, Steer PJ. Maternal and fetal characteristics associated with meconium-stained amniotic fluid. Obstetrics & Gynecology. 2011; 117(4): 828-35.
[17]
Lee KA, Mi lee S, Jin Yang H, Park C-W, Mazaki-Tovi S, Hyun Yoon B, et al. The frequency of meconium-stained amniotic fluid increases as a function of the duration of labor. The Journal of Maternal-Fetal & Neonatal Medicine. 2011; 24(7): 880-5.
[18]
Starks GC. Correlation of meconium-stained amniotic fluid, early intrapartum fetal pH, and Apgar scores as predictors of perinatal outcome. Obstetrics and gynecology. 1980; 56(5): 604-9.
[19]
Tayade S. The significance of meconium stained amniotic fluid–A cross sectional study in a rural setup. IJBAR. 2012; 12(3): 861-66.
[20]
Gupta V, Bhatia B, Mishra O. Meconium stained amniotic fluid: antenatal, intrapartum and neonatal attributes. Indian pediatrics. 1996; 33: 293-8.
[21]
Elsersy MA. Utility of amnioinfusion in deliveries complicated by meconium stained liquor: a randomized controlled trial. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 2016; 6(1): 65-71.
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Waterstone M, Murphy JD, Bewley S, Wolfe C. Incidence and predictors of severe obstetric morbidity: case-control studyCommentary: Obstetric morbidity data and the need to evaluate thromboembolic disease. Bmj. 2001; 322(7294): 1089-94.
[23]
Swain P, Thapalial A. Meconium stained amniotic fluid–a potential predictor of meconium aspiration syndrome. Journal of Nepal Paediatric Society. 2008; 28(1): 3-6.
[11-23]
. In our study 3 (1.4%) babies died of meconium aspiration syndrome related complications.
Predictors for poor fetal outcomes.
Meconium stained amniotic fluid is really worrisome from both, obstetrician’s and pediatrician’s points of view as it is associated with poor fetal outcome
[2]
Mundhra R, Agarwal M. Fetal outcome in meconium stained deliveries. Journal of clinical and diagnostic research: JCDR. 2013; 7(12): 2874.
[2]
. Predictors for poor fetal outcomes among patients with meconium stained amniotic fluid if known can help improve the fetal outcomes in this population group. In our study, we found grade three (thick) meconium, development of meconium as a new event during labor monitoring and null parity as significant predictors for poor fetal outcomes.
In this study we found that, thick meconium (grade III) was significantly associated with low score and meconium aspiration syndrome. Similar results were reported in other studies from Thailand, USA and India in which thick meconium was significantly associated with low Apgar score in both first and fifth minute of life and meconium aspiration syndrome
[18]
Starks GC. Correlation of meconium-stained amniotic fluid, early intrapartum fetal pH, and Apgar scores as predictors of perinatal outcome. Obstetrics and gynecology. 1980; 56(5): 604-9.
[20]
Gupta V, Bhatia B, Mishra O. Meconium stained amniotic fluid: antenatal, intrapartum and neonatal attributes. Indian pediatrics. 1996; 33: 293-8.
[26]
Trainak S, Siwadune T. Factors Associated with Meconium Aspiration Syndrome in Cases with Meconium-Stained Amniotic Fluid. Thai Journal of Obstetrics and Gynaecology. 2016; 24(4): 240-6.
[18, 20, 26]
. Prevalence of meconium was high in our study; therefore, it is not surprising to have a significant number of women with thick meconium. Labor by itself is a stressful condition such that some fetus may not withstand leading to passage of thick meconium as a sign of fetal distress than maturity
[17]
Lee KA, Mi lee S, Jin Yang H, Park C-W, Mazaki-Tovi S, Hyun Yoon B, et al. The frequency of meconium-stained amniotic fluid increases as a function of the duration of labor. The Journal of Maternal-Fetal & Neonatal Medicine. 2011; 24(7): 880-5.
[17]
. Thus, these fetuses score low and they are likely to aspirate meconium than those fetuses that pass meconium just because of maturity. Furthermore, many women come for admission while in the advanced stage of labor this means that labor started at home where no means to properly monitor the wellbeing of the fetus, this can explain as to why despite doing caesarian section the outcome was not good to most of fetus
[17]
Lee KA, Mi lee S, Jin Yang H, Park C-W, Mazaki-Tovi S, Hyun Yoon B, et al. The frequency of meconium-stained amniotic fluid increases as a function of the duration of labor. The Journal of Maternal-Fetal & Neonatal Medicine. 2011; 24(7): 880-5.
[17]
. Moreover, high concentration of chemicals like bile salts in thick (grade III) meconium such that even little aspirate will cause more harm than the Moderate to thin meconium
[19]
Tayade S. The significance of meconium stained amniotic fluid–A cross sectional study in a rural setup. IJBAR. 2012; 12(3): 861-66.
[19]
.
This study also found a significant association between poor fetal outcome and development of meconium as a new event during labor monitoring. This predictor has not yet reported by any study from literature. These are women who on admission had clear liquor just to develop meconium while in the ward monitored for labor. We speculate that some fetuses cannot withstand the stress of labor thus passage of meconium at an advanced stage of labor is the indication of fetal distress. As reported by one study in Ohio, USA, many fetuses passed meconium as the labor advances
[18]
Starks GC. Correlation of meconium-stained amniotic fluid, early intrapartum fetal pH, and Apgar scores as predictors of perinatal outcome. Obstetrics and gynecology. 1980; 56(5): 604-9.
[18]
. The situation may be worsened by our means of monitoring labor whereby fetostethoscope (Pinard) is applied to monitor fetal heart rate. By this mean it may be difficult to timely identify the features of non-reassuring fetal status.
Our study also noted that null parity was a predictor for poor fetal outcomes, a finding that has not yet been documented in literature. Women with no previous history of birth have been associated with most of obstetric complications. Furthermore, these women are also likely to have prolonged labor as compared to multiparous
[17]
Lee KA, Mi lee S, Jin Yang H, Park C-W, Mazaki-Tovi S, Hyun Yoon B, et al. The frequency of meconium-stained amniotic fluid increases as a function of the duration of labor. The Journal of Maternal-Fetal & Neonatal Medicine. 2011; 24(7): 880-5.
[17]
. For this reason, their fetuses are at increased risk of passing meconium as a sign of fetal distress. The tendency of in-utero passage of meconium was associated with null parity in one study done in Brazil
[7]
Osava RH, Silva FMBd, Oliveira SMJVd, Tuesta EF, AmaralMCEd. Meconium-stained amniotic fluid and maternal and neonatal factors associated. Revista de saudepublica. 2012; 46(6): 1023-9.
[7]
. In our study more, women with meconium stained amniotic fluid delivered by caesarian section than spontaneous vaginal delivery with an indication of non-reassuring fetal status. A study in Brasil also reported similar findings suggesting that whenever the incidence of meconium stained amniotic fluid is high, the fetal vitality may also be worse giving out a poor fetal outcome
[7]
Osava RH, Silva FMBd, Oliveira SMJVd, Tuesta EF, AmaralMCEd. Meconium-stained amniotic fluid and maternal and neonatal factors associated. Revista de saudepublica. 2012; 46(6): 1023-9.
[7]
. This may help to explain as to why this group of women in our study was associated with poor outcome. However more studies are needed to investigate the reasons behind this.
5. Conclusion
The prevalence of meconium stained amniotic fluid was found to be 17.4%. Predictors for poor fetal outcomes were found to be; thick (grade III) meconium, development of meconium as a new event during labor monitoring and null parity. Immediate interventions are recommended for those with predictors for poor birth outcome. Women should continue to deliver at the hospital so that if complications emerging during labor will be easy to be discovered and managed accordingly to improve birth outcome. Also, we recommend more studies to be done to find scientific interventions that will improve fetal outcomes among women who develop meconium during labor.
Abbreviations
MSAF
Meconium Stained Amniotic Fluid
BMC
Bugando Medical Centre
CUHAS
Catholic University of Health and Allied Sciences
Acknowledgments
The authors would like to acknowledge all people who participated in this study, particularly participants, the Director General BMC hospital and those who in one way or another have contributed to the development of this research.
Author Contributions
Simon MalihuKamuli: Conceptualization, proposal writing, data collection, analysis and manuscript writing
EliezaChibwe: Designed, executed the study and prepared manuscript which was reviewed and approved by all authors
Albert AlbertKihunrwa: Proposal writing, data collection, analysis and manuscript writing
Innocent Lutakyamilwa Kaiza: Reviewed the study and manuscript development
Ndakibae Gabriel Mabega: Proposal writing, data collection, analysis and manuscript writing
Declaration
Ethics Approval and Consent to Participate All methods were carried out in accordance with relevant guidelines and regulations, informed consent was obtained from all subjects and/or their legal guardian(s). This study was approved by BMC/CUHAS ETHICS. Permission for conducting the research was granted by the Director of Bugando Medical Centre. The consent was also sought from the participants before recruitment.
Consent for Publication
All authors read the manuscript and approved it for Publication.
Data Availability Statement
The database used and analyzed during the current study is available from the corresponding author and will available on request.
Conflicts of Interest
The authors declare no conflicts of interest.
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Lee KA, Mi lee S, Jin Yang H, Park C-W, Mazaki-Tovi S, Hyun Yoon B, et al. The frequency of meconium-stained amniotic fluid increases as a function of the duration of labor. The Journal of Maternal-Fetal & Neonatal Medicine. 2011; 24(7): 880-5.
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Kamuli, S. M., Kaiza, I. L., Kihunrwa, A., Chibwe, E., Mabega, N. G. (2024). Prevalence of Meconium Stained Amniotic Fluid and Predictors for Poor Fetal Outcomes Among Women Delivering at Bugando Medical Centre Mwanza Tanzania. European Journal of Preventive Medicine, 12(4), 94-102. https://doi.org/10.11648/j.ejpm.20241204.12
Kamuli, S. M.; Kaiza, I. L.; Kihunrwa, A.; Chibwe, E.; Mabega, N. G. Prevalence of Meconium Stained Amniotic Fluid and Predictors for Poor Fetal Outcomes Among Women Delivering at Bugando Medical Centre Mwanza Tanzania. Eur. J. Prev. Med.2024, 12(4), 94-102. doi: 10.11648/j.ejpm.20241204.12
Kamuli SM, Kaiza IL, Kihunrwa A, Chibwe E, Mabega NG. Prevalence of Meconium Stained Amniotic Fluid and Predictors for Poor Fetal Outcomes Among Women Delivering at Bugando Medical Centre Mwanza Tanzania. Eur J Prev Med. 2024;12(4):94-102. doi: 10.11648/j.ejpm.20241204.12
@article{10.11648/j.ejpm.20241204.12,
author = {Simon Malihu Kamuli and Innocent Lutakyamilwa Kaiza and Albert Kihunrwa and Elieza Chibwe and Ndakibae Gabriel Mabega},
title = {Prevalence of Meconium Stained Amniotic Fluid and Predictors for Poor Fetal Outcomes Among Women Delivering at Bugando Medical Centre Mwanza Tanzania
},
journal = {European Journal of Preventive Medicine},
volume = {12},
number = {4},
pages = {94-102},
doi = {10.11648/j.ejpm.20241204.12},
url = {https://doi.org/10.11648/j.ejpm.20241204.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ejpm.20241204.12},
abstract = {Background: Meconium stained amniotic fluid occurs in up to 20% of all deliveries and is reported to vary in different settings across the world. Babies delivered by these women are at high risk of low score and meconium aspiration syndrome. Limited studies have reported on the predictors for poor fetal outcomes in women presenting with meconium stained amniotic fluid. Methods: This was a cross sectional study involving 209 pregnant women with meconium stained amniotic fluid. Semi structured questionnaire was used for data collection. Data were analyzed using STATA version 12. Results: A total of 1202 women delivered during the study period from December 2017 to February 2018. Amongst, 209 (17.4%) women had meconium stained amniotic fluid. Of the 209 babies, 35 (16.7%) had low score, 41 (19.6%) were admitted due to meconium aspiration syndrome and 3 (1.4%) died due to meconium aspiration syndrome related complications. Predictors for poor fetal outcomes were found to be Thick meconium (Grade III), Meconium as a new event during labor monitoring and null parity. Conclusion: The prevalence of meconium stained amniotic fluid at Bugando Medical Centre was found to be 17.4%. Thick meconium, development of meconium as a new event and nullparous were found to predict for poor fetal outcomes. Immediate interventions are recommended for those with the identified predictors for poor fetal outcome.
},
year = {2024}
}
TY - JOUR
T1 - Prevalence of Meconium Stained Amniotic Fluid and Predictors for Poor Fetal Outcomes Among Women Delivering at Bugando Medical Centre Mwanza Tanzania
AU - Simon Malihu Kamuli
AU - Innocent Lutakyamilwa Kaiza
AU - Albert Kihunrwa
AU - Elieza Chibwe
AU - Ndakibae Gabriel Mabega
Y1 - 2024/08/15
PY - 2024
N1 - https://doi.org/10.11648/j.ejpm.20241204.12
DO - 10.11648/j.ejpm.20241204.12
T2 - European Journal of Preventive Medicine
JF - European Journal of Preventive Medicine
JO - European Journal of Preventive Medicine
SP - 94
EP - 102
PB - Science Publishing Group
SN - 2330-8230
UR - https://doi.org/10.11648/j.ejpm.20241204.12
AB - Background: Meconium stained amniotic fluid occurs in up to 20% of all deliveries and is reported to vary in different settings across the world. Babies delivered by these women are at high risk of low score and meconium aspiration syndrome. Limited studies have reported on the predictors for poor fetal outcomes in women presenting with meconium stained amniotic fluid. Methods: This was a cross sectional study involving 209 pregnant women with meconium stained amniotic fluid. Semi structured questionnaire was used for data collection. Data were analyzed using STATA version 12. Results: A total of 1202 women delivered during the study period from December 2017 to February 2018. Amongst, 209 (17.4%) women had meconium stained amniotic fluid. Of the 209 babies, 35 (16.7%) had low score, 41 (19.6%) were admitted due to meconium aspiration syndrome and 3 (1.4%) died due to meconium aspiration syndrome related complications. Predictors for poor fetal outcomes were found to be Thick meconium (Grade III), Meconium as a new event during labor monitoring and null parity. Conclusion: The prevalence of meconium stained amniotic fluid at Bugando Medical Centre was found to be 17.4%. Thick meconium, development of meconium as a new event and nullparous were found to predict for poor fetal outcomes. Immediate interventions are recommended for those with the identified predictors for poor fetal outcome.
VL - 12
IS - 4
ER -
Department of Obstetrics and Gynecology, SekouTouré Regional Referral Hospital, Mwanza, United Republic of Tanzania
Albert Kihunrwa
Department of Obstetrics and Gynecology, Bugando Medical Centre, Catholic University of Health and Allied Sciences, Mwanza, United Republic of Tanzania
Elieza Chibwe
Department of Clinical Research, National Institute for Medical Research, Mwanza Research Centre, Mwanza, United Republic of Tanzania
Ndakibae Gabriel Mabega
Department of Clinical Research, National Institute for Medical Research, Mwanza Research Centre, Mwanza, United Republic of Tanzania
Kamuli, S. M., Kaiza, I. L., Kihunrwa, A., Chibwe, E., Mabega, N. G. (2024). Prevalence of Meconium Stained Amniotic Fluid and Predictors for Poor Fetal Outcomes Among Women Delivering at Bugando Medical Centre Mwanza Tanzania. European Journal of Preventive Medicine, 12(4), 94-102. https://doi.org/10.11648/j.ejpm.20241204.12
Kamuli, S. M.; Kaiza, I. L.; Kihunrwa, A.; Chibwe, E.; Mabega, N. G. Prevalence of Meconium Stained Amniotic Fluid and Predictors for Poor Fetal Outcomes Among Women Delivering at Bugando Medical Centre Mwanza Tanzania. Eur. J. Prev. Med.2024, 12(4), 94-102. doi: 10.11648/j.ejpm.20241204.12
Kamuli SM, Kaiza IL, Kihunrwa A, Chibwe E, Mabega NG. Prevalence of Meconium Stained Amniotic Fluid and Predictors for Poor Fetal Outcomes Among Women Delivering at Bugando Medical Centre Mwanza Tanzania. Eur J Prev Med. 2024;12(4):94-102. doi: 10.11648/j.ejpm.20241204.12
@article{10.11648/j.ejpm.20241204.12,
author = {Simon Malihu Kamuli and Innocent Lutakyamilwa Kaiza and Albert Kihunrwa and Elieza Chibwe and Ndakibae Gabriel Mabega},
title = {Prevalence of Meconium Stained Amniotic Fluid and Predictors for Poor Fetal Outcomes Among Women Delivering at Bugando Medical Centre Mwanza Tanzania
},
journal = {European Journal of Preventive Medicine},
volume = {12},
number = {4},
pages = {94-102},
doi = {10.11648/j.ejpm.20241204.12},
url = {https://doi.org/10.11648/j.ejpm.20241204.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ejpm.20241204.12},
abstract = {Background: Meconium stained amniotic fluid occurs in up to 20% of all deliveries and is reported to vary in different settings across the world. Babies delivered by these women are at high risk of low score and meconium aspiration syndrome. Limited studies have reported on the predictors for poor fetal outcomes in women presenting with meconium stained amniotic fluid. Methods: This was a cross sectional study involving 209 pregnant women with meconium stained amniotic fluid. Semi structured questionnaire was used for data collection. Data were analyzed using STATA version 12. Results: A total of 1202 women delivered during the study period from December 2017 to February 2018. Amongst, 209 (17.4%) women had meconium stained amniotic fluid. Of the 209 babies, 35 (16.7%) had low score, 41 (19.6%) were admitted due to meconium aspiration syndrome and 3 (1.4%) died due to meconium aspiration syndrome related complications. Predictors for poor fetal outcomes were found to be Thick meconium (Grade III), Meconium as a new event during labor monitoring and null parity. Conclusion: The prevalence of meconium stained amniotic fluid at Bugando Medical Centre was found to be 17.4%. Thick meconium, development of meconium as a new event and nullparous were found to predict for poor fetal outcomes. Immediate interventions are recommended for those with the identified predictors for poor fetal outcome.
},
year = {2024}
}
TY - JOUR
T1 - Prevalence of Meconium Stained Amniotic Fluid and Predictors for Poor Fetal Outcomes Among Women Delivering at Bugando Medical Centre Mwanza Tanzania
AU - Simon Malihu Kamuli
AU - Innocent Lutakyamilwa Kaiza
AU - Albert Kihunrwa
AU - Elieza Chibwe
AU - Ndakibae Gabriel Mabega
Y1 - 2024/08/15
PY - 2024
N1 - https://doi.org/10.11648/j.ejpm.20241204.12
DO - 10.11648/j.ejpm.20241204.12
T2 - European Journal of Preventive Medicine
JF - European Journal of Preventive Medicine
JO - European Journal of Preventive Medicine
SP - 94
EP - 102
PB - Science Publishing Group
SN - 2330-8230
UR - https://doi.org/10.11648/j.ejpm.20241204.12
AB - Background: Meconium stained amniotic fluid occurs in up to 20% of all deliveries and is reported to vary in different settings across the world. Babies delivered by these women are at high risk of low score and meconium aspiration syndrome. Limited studies have reported on the predictors for poor fetal outcomes in women presenting with meconium stained amniotic fluid. Methods: This was a cross sectional study involving 209 pregnant women with meconium stained amniotic fluid. Semi structured questionnaire was used for data collection. Data were analyzed using STATA version 12. Results: A total of 1202 women delivered during the study period from December 2017 to February 2018. Amongst, 209 (17.4%) women had meconium stained amniotic fluid. Of the 209 babies, 35 (16.7%) had low score, 41 (19.6%) were admitted due to meconium aspiration syndrome and 3 (1.4%) died due to meconium aspiration syndrome related complications. Predictors for poor fetal outcomes were found to be Thick meconium (Grade III), Meconium as a new event during labor monitoring and null parity. Conclusion: The prevalence of meconium stained amniotic fluid at Bugando Medical Centre was found to be 17.4%. Thick meconium, development of meconium as a new event and nullparous were found to predict for poor fetal outcomes. Immediate interventions are recommended for those with the identified predictors for poor fetal outcome.
VL - 12
IS - 4
ER -