A lot of blood clots after medical abortion may be caused by embryonic tissue, poor uterine contraction, incomplete abortion and other factors. 1. Embryonic tissues: Generally speaking, patients who have a lot of blood clots after medical abortion may be caused by blood, peeled off meconium, mucus in the uterine cavity, as well as the gestational sac. When the gestational sac is discharged, the vaginal blood clots will gradually decrease, no need to worry too much, is a normal phenomenon. 2. Poor uterine contraction: some patients after medical abortion, due to the uterus has not yet fully recovered, part of the adherence to the uterine wall of the meconium is not completely stripped, affecting the uterine contraction, there may be a lot of blood clots discharged. 3. Incomplete abortion: after the drug abortion also appeared a lot of blood clots, need to consider is incomplete abortion due to, when the embryo, embryo appendage has not been completely from the uterine cavity to the outside of the body, can be manifested as repeated bleeding clots. Patients may be accompanied by abdominal pain, fatigue, nausea and other symptoms. It is recommended that patients who discharge a lot of blood clots after medical abortion need to promptly identify the cause of the disease, and actively cooperate with the doctor to take relevant therapeutic measures.