Not having menstruation after taking progesterone may be caused by pregnancy, low estrogen level, cervical adhesion, etc. According to different situations, we will give you perfect examination, estrogen supplementation or surgical treatment. 1. Early pregnancy: after stopping progesterone, due to the withdrawal of hormone levels, the endometrium will peel off, causing menstruation. The absence of menstruation after taking progesterone may be caused by pregnancy, improve the blood chorionic gonadotropin level and ultrasound examination to clarify whether there is pregnancy. 2. Low estrogen level: Women with low estrogen level due to perimenopause or ovarian damage may not have menstruation after stopping progesterone. Oral estradiol is given to supplement estrogen, and then oral progesterone is given again, and most of them will have menstruation after stopping. 3. Cervical adhesion: Cervical adhesion is caused by abortion, curettage, cervical conical resection, and cervical mucous membrane injury. After complete adhesion, there is no menstruation after taking progesterone and stopping the medication, and most of them are accompanied by lower abdominal pain. Cervical adhesion dilatation is given, and menstruation occurs in most cases. If you don’t have menstruation after stopping progesterone, please consult a doctor to find out the cause and give specific treatment under the doctor’s guidance.