How long can you make a drug flow in early pregnancy?

If the pregnancy period can be selected within 49 days of drug abortion, women should go to the obstetrics department of the regular hospital before abortion to do B-ultrasound examination, determine intrauterine pregnancy, and observe the size and position of the gestational sac; drug abortion is less harmful to the body, but it is easy to appear drug flow is not clean phenomenon, so vaginal bleeding phenomenon should be observed.