After weaning, if a woman has resumed her normal menstrual cycle and has had sex, and has not had a period since, she may be pregnant. At this time, we can monitor early pregnancy or take a blood test for HCG to more accurately reflect whether or not you are pregnant. If pregnancy is ruled out by a blood test and no menstruation occurs, it is possible that the woman is overworked from taking care of her baby, or that she has changed her lifestyle or stayed up late at night, which may cause abnormalities in the function of the gonadal axis, such as ovarian dysfunction, abnormal ovulation or abnormal luteal function, and so on. In some cases, oral contraceptive pills such as Eusyn are needed to restore the menstrual cycle.