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  • Title: Repeated medical abortions and the risk of preterm birth in the subsequent pregnancy.
    Author: Liao H, Wei Q, Duan L, Ge J, Zhou Y, Zeng W.
    Journal: Arch Gynecol Obstet; 2011 Sep; 284(3):579-86. PubMed ID: 20978775.
    Abstract:
    PURPOSE: The aim of this study was to determine the impact of repeated first trimester mifepristone-induced medical abortions on the risk of preterm birth in a subsequent pregnancy. METHODS: This is a pregnancy-based cohort study. Clinical data were collected from seven public hospitals in Chengdu, China from January 2006 to December 2009. Pregnant women with one or more first trimester mifepristone-induced medical abortions, and/or one or more surgical abortions, or no previous induced abortions were included in the study. The women were monitored through pregnancy and birth. Samples for analysis included 18,024 singleton births. RESULTS: The risk of preterm birth among women with one or more first trimester mifepristone-induced abortions did not differ significantly from the risk among primigravida women (OR 1.03, 95% confidence interval 0.53-1.63). The risks of preterm birth were higher among women with repeated surgical abortions in comparison to women with repeated medical abortions (OR 1.22, 95% confidence interval 1.03-1.64). CONCLUSIONS: A history of multiple first trimester mifepristone-induced abortions is not associated with a higher risk of preterm delivery among singleton births in the first subsequent pregnancy.
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