Medical abortion is not recommended at 8 weeks of pregnancy, it should be done within 49 days of pregnancy, as the gestational sac is relatively small so that it can flow cleanly. If it is more than 49 days, the gestational sac is more developed, which will lead to incomplete abortion and may result in a larger amount of residue in the uterine cavity, which will also need to be cleared, and its will lead to secondary pain. So before having a medical abortion you need to have an ultrasound to check the development of the gestational sac. If the gestational sac is <2cm, it can be aborted by medication. If the amount of residue is small, it can be facilitated by using drugs to activate blood circulation and remove blood stasis. If the residual amount is large, the uterus will need to be cleaned up by purging.