After ovulation, if the purpose is to treat shortened menstrual cycle due to progesterone deficiency or irregular vaginal bleeding in the second half of menstruation due to progesterone deficiency, it is recommended to take drospirenone tablets for 10 consecutive days before stopping the medication, and menstruation will come 3-7 days after stopping the medication. If you have sexual intercourse during ovulation and plan to get pregnant, it is recommended that you take oral drospirenone tablets after ovulation for 15 days and do not stop taking them for a while. If the result is positive, it is recommended to continue to take the tablets for another 5 days to check whether the size of the gestational sac matches the number of days after menopause by ultrasound and to monitor the normal growth rate of the blood HCG before deciding whether it is necessary to stop the medication.