The first is that after 50 days of medical abortion, the endocrine hormone level can change, and estrogen and progesterone level can decrease, which can affect the normal growth of the lining, and lead to the menstruation can’t come. Second, after the abortion, there may be a small amount of residual tissue inside the uterine cavity is not clean, long-term in the uterine cavity, tissue mechanization, there will be uterine adhesions and other adverse sequelae, but also can not come to menstruation. If you have not had your period for 50 days, you need to go to the hospital for an ultrasound examination to observe the specific situation inside the uterine cavity. If the lining is thin and menstruation cannot come, sex hormone drugs are needed to regulate menstruation; if menstruation cannot come due to uterine adhesions, hysteroscopic separation surgery should be considered.