Study on epidemiology of premature delivery

Objective:To analyze some epidemiological characteristics of preterm birth.Methods:Retrospective case control study.Results: Comparing with the single full-term babies' mothers, the single premature delivery mothers were more at the “20 age group” significantly, with higher proportion of multipara, inadequate antenatal examination times and flooting population. Caesarean was quite common method of delivery in premature delivery, and the postnatal hemorrhage rate and the asphyxia rate of newborn were significantly higher than that of the control group. Conclusion: The rate of Premature rupture of the fatal membranes and premature delivery with medical indication were all 37%, natural premature delivery was 22%. Single premature delivery has seasonal distribution, which June is peak month.