The second month of the birth control pill, menstruation came a few days and then stopped, stopping menstruation may be caused by the side effects of the birth control pill, the second month of menstruation after the sexual intercourse, stopping menstruation is considered to be caused by pregnancy. The second month after taking birth control pills, there will be menstruation, indicating that the previous intercourse is not pregnant, the birth control pills belong to the estrogen and progesterone class of drugs, after taking the body may cause endocrine disorders, causing menstrual cycle disorders or menopause performance. The second month of the birth control pill, after the onset of menstruation, have sex, and then stop menstruation should be considered to be caused by pregnancy, after the pregnancy of women’s body estrogen and progesterone level increases, not able to stimulate the endometrium to occur cyclical changes, menstruation will be suspended, belong to the physiological phenomenon. The second month of birth control pills, menstruation came a few days and then stop menstruation is more reasons, it is recommended to timely medical treatment, improve the relevant examination, in the guidance of a professional doctor to clarify the cause of the disease, targeted treatment.