2013-06-01 美国妇产科医师学会 Obstet Gynecol. 2013.121(6). 1394-406.
ACOG Practice Bulletin No. 135: Second-trimester abortion.
In the United States, more than one half of pregnancies are unintended, with 3 in 10 women having an abortion byage 45 years (1). In 2008, 1.2 million abortions occurred in the United States, of which 6.2% took place between13 weeks of gestation and 15 weeks of gestation, and 4.0% took place at 16 weeks of gestation or later (2, 3). Only1.3% of abortions are performed at 21 weeks of gestation or later (4). The proportion of abortions performed in thesecond trimester, usually defined as between 13 weeks of gestation and 26 weeks of gestation (as calculated from thelast menstrual period), has remained stable during the past two decades (4). The purpose of this document is to provideevidence-based guidelines for the medical and surgical methods of second-trimester termination as well as forthe management of associated complications.