A woman can have an abortion on an outpatient basis up to 10 weeks of pregnancy. Generally, abortion can be performed on an outpatient basis from 6-8 weeks of pregnancy. Because the gestational sac is >4cm in diameter after 8-10 weeks, and there is a small amount of amniotic fluid, and the embryo is more than 2cm, it is easy to bleed a lot during the surgical operation, and it is also easy to cause uterine perforation, and it is also easy to cause residual tissue and complications of amniotic fluid embolism, so abortion is no longer performed in outpatient clinics after 8-10 weeks of pregnancy, and abortion can be performed in outpatient clinics after 6-8 weeks of pregnancy.