- Open Access
Trends and determinants of stillbirth in developing countries: results from the Global Network’s Population-Based Birth Registry
- Sarah Saleem1Email author,
- Shiyam Sunder Tikmani1,
- Elizabeth M. McClure2,
- Janet L. Moore2,
- Syed Iqbal Azam1,
- Sangappa M. Dhaded3,
- Shivaprasad S. Goudar3,
- Ana Garces4,
- Lester Figueroa4,
- Irene Marete5,
- Constance Tenge5,
- Fabian Esamai5,
- Archana B. Patel6,
- Sumera Aziz Ali1,
- Farnaz Naqvi1,
- Musaku Mwenchanya7,
- Elwyn Chomba7,
- Waldemar A. Carlo8,
- Richard J. Derman9,
- Patricia L. Hibberd10,
- Sherri Bucher11,
- Edward A. Liechty11,
- Nancy Krebs12,
- K. Michael Hambidge12,
- Dennis D. Wallace2,
- Marion Koso-Thomas13,
- Menachem Miodovnik13 and
- Robert L. Goldenberg14
© The Author(s). 2018
- Published: 22 June 2018
Stillbirth rates remain high, especially in low and middle-income countries, where rates are 25 per 1000, ten-fold higher than in high-income countries. The United Nations’ Every Newborn Action Plan has set a goal of 12 stillbirths per 1000 births by 2030 for all countries.
From a population-based pregnancy outcome registry, including data from 2010 to 2016 from two sites each in Africa (Zambia and Kenya) and India (Nagpur and Belagavi), as well as sites in Pakistan and Guatemala, we evaluated the stillbirth rates and rates of annual decline as well as risk factors for 427,111 births of which 12,181 were stillbirths.
The mean stillbirth rates for the sites were 21.3 per 1000 births for Africa, 25.3 per 1000 births for India, 56.9 per 1000 births for Pakistan and 19.9 per 1000 births for Guatemala. From 2010 to 2016, across all sites, the mean stillbirth rate declined from 31.7 per 1000 births to 26.4 per 1000 births for an average annual decline of 3.0%. Risk factors for stillbirth were similar across the sites and included maternal age < 20 years and age > 35 years. Compared to parity 1–2, zero parity and parity > 3 were both associated with increased stillbirth risk and compared to women with any prenatal care, women with no prenatal care had significantly increased risk of stillbirth in all sites.
At the current rates of decline, stillbirth rates in these sites will not reach the Every Newborn Action Plan goal of 12 per 1000 births by 2030. More attention to the risk factors and treating the causes of stillbirths will be required to reach the Every Newborn Action Plan goal of stillbirth reduction.
- Low-middle income countries
- Rates of decline
For international comparisons, the World Health Organization (WHO) defines a stillbirth as a baby born with no signs of life at or after 28 weeks’ gestation . Globally in 2015, 2.6 million third trimester stillbirths occurred and most of these were in low- and middle-income countries (LMICs), three quarters in south Asia and sub-Saharan Africa . The third trimester stillbirth rate in south Asia and sub-Saharan Africa is approximately 10 times that of developed countries (29 vs. 3 per 1000 births) . The number of stillbirths that occur in the second trimester in LMICs is unknown but in high-income countries, half of all stillbirths occur between 20 and 28 weeks of gestation .
Several distal, intermediate and proximal factors contribute to the high stillbirth rates in LMIC, and these tend to be related to one another . Potential distal factors include lack of education of women, low socioeconomic status, and the inability to make timely decisions about seeking care. Intermediate factors related to stillbirth may include advanced or young maternal age, lack of awareness about danger signs, delay in moving to a hospital, non-availability of community resources, and poor maternal nutritional status [4, 5]. Finally, maternal and fetal medical conditions and the poor response of the health care system to these conditions act as proximal risk factors for stillbirth. As an example of the inter-relatedness of these factors, illiteracy is often associated with poverty, which is correlated with food insecurity, malnutrition and anemia. Poverty and low educational status can also affect a family’s decisions about seeking care such as identifying danger signs, and accessing antenatal, delivery, or emergency care. In many resource-poor countries, even when women may reach a facility in time for a potentially life-saving intervention, inadequately prepared facilities may fail to prevent adverse maternal or fetal outcomes .
From a public health perspective, and especially for LMICs, much of the literature on maternal mortality has emphasized determining a clinical cause for deaths occurring in hospitals and community settings. In addition, the three-delay model has been used to address distal and proximate determinants of maternal mortality and to test treatment protocols for well-defined clinical causes of maternal death.
However, until recently, this interest was lacking for fetal deaths as well as for perinatal and early neonatal mortality. Even though recent global analyses suggest a 25.5% overall decline in stillbirth rates over the last 5 years, large variations in stillbirth rates exist between and within LMIC, and many LMICs have experienced little if any reduction in stillbirths [7, 8]. The majority of these fetal deaths occur in the intra-partum period and most of these occur at or near term and many are associated with maternal causes of morbidity and mortality. However, in two-thirds of these stillbirths there was no indication of a maternal complication prior to going into labor .
The available literature suggests that several risk factors for stillbirth are common across LMICs . These risk factors may vary by country depending upon the availability of resources for provision of care, as well as access to care by remotely located populations. The lack of a functional vital registration system also appears to be associated with high stillbirth rates [2, 7]. National data for stillbirth rates are rarely available from countries where most stillbirths occur. In LMICs, demographic and health surveys generally have not included stillbirths as routine pregnancy outcomes, and when this information is available, it is subjective and based on the responses of women without validation of gestational age [3, 9]. In many countries, information on stillbirth is derived primarily from hospital-based settings or based on data collected from a small number of locations.
We have previously explored stillbirth rates in sites participating in the Global Network for Women’s and Children’s Health Research [10–12]. The objective of this paper is to update trends in stillbirth rates over the years at these sites and to estimate the average annual percent change in these rates. In addition, we wanted to determine and compare distal and intermediate factors associated with stillbirths in sites in Africa, Pakistan, India and Guatemala.
The Global Network’s Maternal Newborn Health Registry (MNHR) is a prospective, population-based observational study that includes all pregnant women and their outcomes in defined geographic communities (clusters). These clusters were established with approximately 300–500 annual births in sites in western Kenya, Zambia (Kafue and Chongwe), Pakistan (District Thatta in Sindh province), India (Belagavi and Nagpur) and Guatemala (Chimaltenango). The MNHR was initiated at each of the study sites between 2008 and 2009.
Registry administrators (RAs) are paid community health workers or nurses who identify pregnant women in their respective areas and after consent enroll them in the MNHR. Once a pregnant woman is identified, the RAs obtain basic health information at enrollment, record the date of last menstrual period, or early ultrasound report to assess gestational age, obtain a hemoglobin assessment where possible, and record the height and weight of the pregnant woman. A follow-up visit is carried out following delivery to collect information on pregnancy outcomes and health care received during delivery. Information on the study outcomes is based on medical record reviews and birth attendant and family interviews.
Stillbirth is defined using a modified WHO criterion of fetal deaths occurring at ≥20 weeks gestation (or for those without gestational age, birth weight of ≥500 g) .
The stillbirth rate was calculated as the number of stillbirths per 1000 births, the sum of live births and stillbirths. A macerated stillbirth was defined as a stillbirth showing signs of maceration at delivery including skin and soft-tissue changes such as skin discoloration, redness, sloughing of skin, and overriding of cranial sutures and was assumed to have occurred at least 12 h prior to delivery. The RAs were trained to recognize stillbirths with maceration using both descriptions and pictures of fetuses with this condition. Those without maceration were considered intra-partum stillbirths.
For the analyses, we combined data from the Kenyan and Zambian sites as the African Region and from the Belagavi and Nagpur sites as the Indian region. Pakistan and Guatemala were considered separately.
We present stillbirth rates for the regions from 2010 to 2016; the average annual percentage decline in stillbirth rates; and distal and proximate determinants of stillbirth for these regions. The average annual percentage change in stillbirth was calculated as [(a/b)(1/r) -1] × 100 where a defines the most recent (2016) stillbirth rate, b defines the earliest (2010) stillbirth rate and r defines the number of years, which for this analysis is 6 . To determine the factors associated with stillbirth, we used the cumulative data for the years 2010 to 2016.
Descriptive analyses included calculation of the frequency and distribution of values. The estimates and relative risks were calculated from a Poison model with generalized estimating equations to control for cluster level effects and included terms for region, maternal age, education, parity, antenatal care, delivery location, birth weight and an interaction term for region with each of the other covariates. Interaction terms with a p-value > 0.2 were excluded from the multivariate model.
All data were entered and reviewed at each study site. De-identified data were transmitted with additional edits performed at the data-coordinating center, Research Triangle Institute (RTI International). All data were analyzed using SAS v.9.3 (Cary, NC).
This study was reviewed and approved by all sites’ ethics review committees Francisco Marroquin University, Guatemala; University of Zambia, Zambia; Moi University, Kenya; Aga Khan University Pakistan; KLE University’s Jawaharlal Nehru Medical College, Belagavi; Lata Medical Research Foundation, Nagpur, the institutional review boards at each U.S. partner university and the data coordinating center (RTI International). All women provided informed consent for participation in the study, including data collection and the follow-up visits.
Stillbirth rate estimates by Global Network region, 2010–2016 and rate of average annual decline
Estimated Stillbirth Risk/1000 (95% CI)a
28.0 (26.6, 29.5)
21.3 (18.7, 24.4)
25.3 (24.0, 26.7)
56.9 (52.6, 61.6)
19.9 (17.5, 22.6)
31.7 (29.5, 34.2)
24.5 (19.9, 30.2)
31.3 (28.5, 34.4)
58.4 (52.0, 65.5)
22.7 (19.5, 26.5)
28.0 (25.7, 30.5)
19.0 (15.2, 23.7)
24.4 (22.0, 27.1)
62.0 (54.9, 70.1)
21.3 (17.4, 26.0)
28.2 (25.6, 31.1)
24.6 (20.3, 29.9)
26.0 (24.1, 28.0)
57.7 (51.8, 64.3)
17.1 (12.5, 23.5)
27.3 (25.2, 29.6)
21.5 (17.6, 26.3)
23.9 (22.1, 25.7)
62.0 (53.6, 71.8)
17.5 (14.4, 21.3)
26.8 (24.8, 29.0)
20.8 (16.7, 25.8)
23.4 (20.7, 26.5)
59.2 (53.9, 65.0)
17.9 (15.1, 21.2)
27.6 (25.2, 30.2)
19.2 (15.1, 24.5)
25.4 (22.5, 28.6)
52.7 (47.0, 59.0)
22.6 (18.4, 27.8)
26.4 (24.4, 28.5)
20.5 (17.4, 24.1)
23.8 (20.9, 27.1)
47.7 (41.5, 54.8)
20.9 (17.4, 25.1)
Average Annual Decline (%)
Characteristics and Delivery Outcome by Global Network Region, 2010–2016
Maternal age, N (%)
Education, N (%)
No formal education
Parity, N (%)
≥ 1 ANC visit, N (%)
Delivery location, N (%)
Preterm N (%)
Birth weight < 2500 g, N (%)
Relative Risks of Stillbirth by Global Network region, 2010–2016
SB Relative Riska (95% CI)
SB Relative Riska (95% CI)
SB Relative Riska (95% CI)
SB Relative Riska (95% CI)
1.11 (1.00, 1.23)
1.13 (1.05, 1.21)
1.03 (0.91, 1.17)
1.03 (0.89, 1.20)
1.63 (1.40, 1.89)
2.39 (1.63, 3.50)
1.41 (1.27, 1.57)
2.21 (1.96, 2.49)
No formal education
0.98 (0.83, 1.16)
1.12 (0.99, 1.26)
1.73 (1.50, 2.00)
2.07 (1.74, 2.46)
1.02 (0.88, 1.17)
1.17 (1.09, 1.26)
1.31 (1.08, 1.59)
1.32 (1.11, 1.55)
1.29 (1.14, 1.45)
1.32 (1.23, 1.41)
1.42 (1.27, 1.58)
1.26 (1.11, 1.43)
1.23 (1.14, 1.32)
1.38 (1.24, 1.53)
1.36 (1.26, 1.48)
1.79 (1.53, 2.08)
≥ 1 ANC visit
4.92 (3.66, 6.61)
2.93 (1.46, 5.89)
1.54 (1.38, 1.71)
2.00 (1.60, 2.50)
0.38 (0.26, 0.55)
0.38 (0.33, 0.45)
0.88 (0.79, 0.99)
0.60 (0.40, 0.89)
0.52 (0.32, 0.84)
3.27 (2.54, 4.22)
0.91 (0.80, 1.03)
0.65 (0.57, 0.74)
In this analysis, in sites in India, Pakistan, Africa and Guatemala, from 2010 to 2016, the mean stillbirth rate declined from 31.7/1000 births to 26.4/1000 births with an average annual reduction rate of 3.0% The Every Newborn Action Plan, a global multi-partner movement to end preventable maternal and neonatal deaths and stillbirths has established a goal to reduce stillbirth rates globally to 12 or less per 1000 births by 2030 [14, 15]. If we assume a rate of 12/1000 births by 2030 and consider the Global Network SBR of 2016 as the benchmark, then the average annual rate of reduction in the stillbirth rate required would be 5.8% which is far higher than the current rate of decline.
Because our study evaluated rates of stillbirth decline in relatively small areas of five countries, we looked for other studies to compare our results. Blencowe et al. performed a large modeling exercise using thousands of data points to estimate stillbirth declines in 195 countries from 2000 to 2015 . While the methodology, many of the definitions, and the years evaluated were different than our study, the overall results were relatively similar. For example, across all sites Blencowe estimated a yearly world-wide reduction in stillbirths of 2.0% while we found a yearly reduction in our sites of 3.0% Our African sites had a reduction of 2.9% while Blencowe’s African sites had an annual reduction of 1.4%. Our Asian sites had a reduction in stillbirths of 4.5% for India and 3.3% for Pakistan, while Blencowe’s Asian sites had an annual reduction of 2.2%. Our Guatemalan site had an estimated yearly reduction of 1.4% while Blencowe’ s Latin American sites had a reduction of 2.1%. Regardless of which numbers more closely approximate reality, few if any of the estimated rates of reduction are sufficient to reach the 2030 Every Newborn Action Plan goal.
The stillbirth rates in our sites are derived from population-based registries that intend to capture all pregnancy outcomes in their area. Thus, we believe these data may provide better information on stillbirth rates than data from hospital births or mathematical models. Nevertheless, the site rates reported here generally approximate the national reported rates. For example, according to a recent publication, Pakistan has the highest reported stillbirth rate in the world at 43.1/1000 births while our study reports a stillbirth rate for 2016 as 47.7/1000 births. In India, the stillbirth rates in different states reportedly range from 20 to 66/1000 births. Bellad et al. reported a stillbirth rate of 28.6/1000 births from Karnataka where one of our Indian sites is situated . The stillbirth rate for Maharashtra district where Nagpur is located as reported by the State Health Department is 17.8/1000 births. The mean stillbirth rate for our Indian sites was 25.3/1000 births. The national stillbirth rate for Kenya as reported by WHO is 21.8/1000 births  and 25.5/1000 births for Zambia , which are close to our reported rates for the African region. For Guatemala, the national stillbirth rate is reported as 10/1000 births . The rates from our study for Guatemala are higher than the national rate, but this difference may partially be explained by the location of our study site that is in an area where the population is primarily indigenous.
The Global Network goes to great lengths at all sites to train data collectors about using standard definitions and locating all pregnancies. Therefore, we have a high level of confidence that the rates of stillbirth presented in this paper are accurate for those regions. We are aware that in this paper we define stillbirth as having a lower gestational age limit of 20 weeks gestation while the WHO often uses a lower gestational age limit of 28 weeks gestation for international comparisons. We believe that stillbirths in the 20 to 27-week range should be counted and present those data here. The impact of this decision on the ability to compare our data with the WHO data is not clear.
Extremes of age, illiteracy, null or high parity, lack of antenatal care and place of delivery all have been documented as being independent risk factors for stillbirth and are commonly found in various LMICs [2, 5, 19]. Our study results confirm that these factors are significantly associated with stillbirth and are common in our regions. Education of women has been identified as an important factor for making timely decisions to prevent adverse maternal and fetal outcomes . In Pakistan and Guatemala, low levels of education were a risk factor for stillbirth. In Pakistan, very few women had even a primary or secondary level of education. However, in Africa, nearly all women had some level of education. Women having more than two prior deliveries and nulliparas were at higher risk of having a stillbirth in all the regions as compared to women with one or two prior deliveries. The literature also suggests that women with more than two prior deliveries are at risk of developing complications during pregnancy including stillbirth [20, 21].
In nearly all the regions, receiving antenatal care during pregnancy was common. However, stillbirths were more common in women who did not receive antenatal care as compared to women who did attend at least one visit. The importance of antenatal care during pregnancy for the screening of potential medical risks such as infection, anaemia, malnutrition, and hypertension cannot be over-emphasized. Lack of quality antenatal care is a missed opportunity for the women.
Most of the stillbirths delivered at the hospitals. We assume that after developing complications in pregnancy, these women approached the hospital when it was too late to save the fetus, or the hospitals were not adequately equipped with essential services such as timely caesarian section or fetal monitoring. Studies from Zambia, Kenya, and Pakistan on the preparedness of health facilities to deal with emergencies, indicate major inadequacies in terms of staffing, training and equipment . In LMICs, especially in rural areas, district hospitals are often not adequately equipped with newborn intensive care units, blood banks and laboratory support.
In addition, many stillbirths occurred in home deliveries. Information on the events which occurred prior to having a stillbirth at home was not available from our data, especially during the intrapartum period. For example, the type of health care provider, duration of labor, presentation of the fetus at the time of labor and any delivery related complications that resulted in stillbirth are often not available.
This study had a number of strengths including that it was population-based and did not rely on data only from hospital admissions. A registry administrator was responsible for identifying pregnancies as early as possible in the pregnancy and reporting the results as soon after delivery as feasible. The data were collected prospectively and five sites in six countries provided data covering more than 427,000 births. Despite the large sample size, these data were collected in relatively small, often rural areas of the individual countries and are not representative samples from the countries.
Even though many of the factors associated with stillbirth remain common to LMICs, we believe that more in-depth knowledge related to these factors will help governments and public health partners to achieve the Early Newborn Action Plan target of 12/1000 stillbirths by 2030. Understanding socio-cultural barriers for seeking care during pregnancy and childbirth may help governments and the private sector to intervene appropriately. Many adverse events occur because treatment costs are not affordable, failure to shift the woman to a facility in a timely fashion, and preference by many women for home deliveries - mostly by an unskilled attendant. With effective public private partnerships, many of these issues can be resolved.
To summarize, stillbirth rates declined in all sites, but not at a sufficient rate to meet the 2030 goals of the Early Newborn Action Plan of 12/1000. Most of the distant and intermediate determinants of stillbirths were common between Africa, India, Pakistan and Guatemala. More local, in-depth information about these determinants and appropriate action to decrease their prevalence are needed to increase the pace of annual reductions in stillbirths.
Funding for the MNHR comes from NICHD to the participating sites and to Research Triangle Institute. Publication charges for this supplement were funded by the University of British Columbia PRE-EMPT (Pre-eclampsia/Eclampsia, Monitoring, Prevention and Treatment) initiative supported by the Bill & Melinda Gates Foundation.
Availability of data and materials
Data from the study will soon be available at the NICHD data repository (N-DASH): https://dash.nichd.nih.gov/.
About this supplement
This article has been published as part of Reproductive Health Volume 15 Supplement 1, 2018: Improving pregnancy outcomes - Proceedings of the 2nd International Conference on Maternal and Newborn Health: Translating Research Evidence to Practice. The full contents of the supplement will be available online at https://reproductive-health-journal.biomedcentral.com/articles/supplements/volume-15-supplement-1.
SS, RLG and EMM conceptualized the study; JM and DDW analyzed the study data. SS, SST, SIA, SMD, SSG, AG, LF, IM, CT, FE, ABP, SAA, FN, MM, EC monitored the field implementation and data collection for the study. SS, RLG, EMM, WAC, RJD, PLH, SB, EAL, NK, KMH, MKT, and MMi developed the initial study protocol. All authors participated in manuscript editing and revision; and all have read and approved the final manuscript.
Ethics approval and consent to participate
This study was reviewed and approved by all sites’ ethics review committees (Francisco Marroquin University, Guatemala; University of Zambia, Zambia; Moi University, Kenya; Aga Khan University; KLE University’s Jawaharlal Nehru Medical College, Belagavi; Lata Medical Research Foundation, Nagpur), and the institutional review boards at each U.S. partner university and the data coordinating center (RTI International). All women provided informed consent for participation in the study, including data collection and the follow-up visits.
Consent for publication
The article was approved for publication by NICHD through its clearance mechanism.
The authors declare that they have no competing interests.
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