Take taking short-acting contraceptive pills for example, the contraceptive mechanism of short-acting pills is to inhibit ovulation and change the thickness of the endometrium so that the endometrium becomes thinner, so that the purpose of contraception is achieved. If you take short-acting contraceptives without ovulation, there will be no more so-called ovulation, so if you take short-acting contraceptives there will be no more ovulation during the whole menstrual cycle. If you stop taking the pill, you will ovulate on the sixteenth day of your menstrual cycle, and you will ovulate four days before and three days after the ovulation time. However, if you take the pill to suppress ovulation, the corresponding ovulation period will no longer occur, and this should be noted.