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  1. Muglu J, Rather H, Arroyo-Manzano D, Bhattacharya S, Balchin I, Khalil A, et al.
    PLoS Med, 2019 07;16(7):e1002838.
    PMID: 31265456 DOI: 10.1371/journal.pmed.1002838
    BACKGROUND: Despite advances in healthcare, stillbirth rates remain relatively unchanged. We conducted a systematic review to quantify the risks of stillbirth and neonatal death at term (from 37 weeks gestation) according to gestational age.

    METHODS AND FINDINGS: We searched the major electronic databases Medline, Embase, and Google Scholar (January 1990-October 2018) without language restrictions. We included cohort studies on term pregnancies that provided estimates of stillbirths or neonatal deaths by gestation week. We estimated the additional weekly risk of stillbirth in term pregnancies that continued versus delivered at various gestational ages. We compared week-specific neonatal mortality rates by gestational age at delivery. We used mixed-effects logistic regression models with random intercepts, and computed risk ratios (RRs), odds ratios (ORs), and 95% confidence intervals (CIs). Thirteen studies (15 million pregnancies, 17,830 stillbirths) were included. All studies were from high-income countries. Four studies provided the risks of stillbirth in mothers of White and Black race, 2 in mothers of White and Asian race, 5 in mothers of White race only, and 2 in mothers of Black race only. The prospective risk of stillbirth increased with gestational age from 0.11 per 1,000 pregnancies at 37 weeks (95% CI 0.07 to 0.15) to 3.18 per 1,000 at 42 weeks (95% CI 1.84 to 4.35). Neonatal mortality increased when pregnancies continued beyond 41 weeks; the risk increased significantly for deliveries at 42 versus 41 weeks gestation (RR 1.87, 95% CI 1.07 to 2.86, p = 0.012). One additional stillbirth occurred for every 1,449 (95% CI 1,237 to 1,747) pregnancies that advanced from 40 to 41 weeks. Limitations include variations in the definition of low-risk pregnancy, the wide time span of the studies, the use of registry-based data, and potential confounders affecting the outcome.

    CONCLUSIONS: Our findings suggest there is a significant additional risk of stillbirth, with no corresponding reduction in neonatal mortality, when term pregnancies continue to 41 weeks compared to delivery at 40 weeks.

    SYSTEMATIC REVIEW REGISTRATION: PROSPERO CRD42015013785.

    Matched MeSH terms: Stillbirth/ethnology
  2. Tan GC, Hayati AR, Khong TY
    Pediatr Dev Pathol, 2010 Sep-Oct;13(5):362-8.
    PMID: 20367214 DOI: 10.2350/09-03-0623-OA.1
    Our objectives were to determine the perinatal autopsy rate in a tertiary hospital in Malaysia and to quantify the value of the perinatal autopsy. All stillbirths, miscarriages, therapeutic abortions, and neonatal deaths between January 1, 2004, and August 31, 2009, were identified from the archives. The autopsy findings were compared with the clinical diagnoses. The autopsy reports were also reviewed to determine if it would be possible to improve the quality of the autopsies. There were 807 perinatal deaths, of which 36 (4.5%) included an autopsy. There were ethnic differences in the rate of autopsy, with the lowest rate among the Malays. The autopsy provided the diagnosis, changed the clinical diagnosis, or revealed additional findings in 58.3% of cases. Ancillary testing, such as microbiology, chromosomal analysis, and biochemistry, could improve the quality of the autopsy. This study provides further data on the perinatal autopsy rate from an emerging and developing country. It reaffirms the value of the perinatal autopsy. Attempts must be made to improve on the low autopsy rate while recognizing that the performance of autopsies can be enhanced through the use of ancillary testing.
    Matched MeSH terms: Stillbirth/ethnology
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