Significantly lower ectopic pregnancy rates after frozen embryo transfer: Implications toward segmentation of in vitro fertilization treatment

摘要

Ectopic pregnancy rates have not declined over the last 15 years in the United States, and a long-term population-based study supports an increasing trend, with an annual age-adjusted rate of 21.1 ectopic pregnancies per 10,000 woman-years between 2005 and 2007 (1). This trend maybe attributed to the significant increase of assisted reproductive technologies (ART) over the last decades and the fact that ectopic pregnancy is twice as frequent in ART cycles compared with natural conception.