I got my period on the 24th day of the 2nd lunar month and had sex today on the 5th day of the 3rd lunar month. There is a possibility of pregnancy, but it is not certain that you will get pregnant. For women who have regular menstrual cycles of about twenty-eight days, the day of ovulation is usually fourteen days before menstruation. If you have your period on the 24th day of the 2nd month of the lunar calendar, then ovulation should occur around the 8th day of the 3rd month of the lunar calendar, and there is a possibility of conception around 5 days before and after the ovulation period. Ovulation is accomplished by the hypothalamus-pituitary-ovarian axis, and if a woman’s menstrual cycle is irregular, or due to stress, dietary disorders, late nights, environmental changes and other reasons, it may cause ovulation to occur earlier or later, which may affect conception. In addition the quality of male sperm can also affect conception. Lunar February 24th menstruation, the first five days of March after sex, to the time of menstruation such as menstruation delay, need to go to the hospital in time to take a blood test of human chorionic gonadotropin (HCG) to confirm whether the pregnancy.