Prior cesarean delivery in women with secondary tubal infertility.

The history of cesarean delivery was evaluated in a population-based case-control study of secondary infertility in King County, Washington. Sixty-one married women diagnosed with secondary infertility due to tubal problems who had a previous viable pregnancy were compared to 343 married women who had a previous viable pregnancy and then had a live birth that was conceived at the same time the infertile women began trying to conceive. The risk of tubal infertility was not substantially elevated in women who had a previous cesarean delivery in the most recent viable pregnancy compared to women with vaginal delivery (odds ratio = 1.2; 95% confidence interval = 0.4, 3.7).