Bleeding is very heavy after taking progesterone and stopping the medication, which may be a normal phenomenon, bad effect of fetal preservation, etc. 1. Normal phenomenon: progesterone, also known as progesterone, is a more important part of the female endocrine system, if the use of progesterone in non-pregnancy, can play a role in regulating menstruation, after the use of medication can promote the growth of the uterine lining, after discontinuing the withdrawal of the drug will be the withdrawal of bleeding, which is a normal physiological phenomenon. 2. bad effect of birth control: after a woman is pregnant, low progesterone will have an aura of miscarriage, this situation needs to be supplemented by eating progesterone, so that the value of progesterone to reach normal, to ensure that the gestational sac and the stable development of the fetus, after a period of time of treatment, the fetus will be more stable, can be a normal growth and development. In this case, the bleeding is very heavy after taking progesterone and stopping the medication, which is considered to be the bad effect of fetal preservation, and may even be the failure of fetal preservation. After taking progesterone stop bleeding very much should be timely communication with the doctor, according to the situation to deal with. In addition, progesterone is a kind of drug, do not just take, should strictly follow the doctor’s instructions.