Abstract
Background: The current recommendation is to delay elective repeat cesarean deliveries (ERCD) until 39 weeks to decrease prematurity risks. Prior reports suggest accelerated maturity of fetuses according to race (African-Americans and Asians).Objective: To analyze the effect of the Hispanic ethnicity on the prematurity risk after ERCD. Methods: The US Natality Database from 2004 to 2008 was reviewed. Inclusion criteria were singleton delivery, no trial of labor, repeat cesarean. Exclusion criteria were fetal anomalies, history of diabetes/hypertension related disorders. Outcomes analyzed were Apgar score, assisted ventilation, intensive care admission, surfactant/antibiotic use and seizures. Two groups were identified: non-Hispanic Whites (NHW) and Hispanic Whites (HW). Regression analysis was performed to calculate adjusted odds ratios. Deliveries at 36–40 weeks were studied with 40 weeks as the reference group.Results: A total of 930 421 ERCDs were identified, 396 823 NHW and 236 733 HW. For NHW, the risk of prematurity was lower at 39 weeks. For HW, there was no difference in the risks of prematurity at/beyond 38 weeks.Conclusion: There appears to be accelerated maturity with no increase in prematurity risk at 38 weeks in HW delivered by ERCD. Ethnicity can be considered for patient counseling and decision making regarding optimal timing of elective interventions.
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