Is it normal for lower abdomen to fall when defecating after medicine flow

Female drug abortion after stool when abdominal pain is normal performance, because drug abortion will lead to a small amount of endometrial bleeding, causing congestion in the uterus, stimulation of the body will cause this performance. Suggestions: female drug abortion after the need to go to the hospital to do B-ultrasound examination, to determine whether there is residue in the uterus.