After ovulation, it takes about 14 days for your period to occur. This is because after ovulation the corpus luteum forms and the ovaries begin to secrete progesterone. The endometrium gradually enters the secretory phase under the effect of progesterone and slowly thickens. Over time, the corpus luteum atrophies. After the corpus luteum atrophies, the endometrium loses the support of estrogen and progesterone, and withdrawal bleeding occurs, which is clinically manifested as menstruation. When you have your period, you should quit smoking and drinking, try to avoid staying up late and straining, eat more fresh fruits and vegetables, eat less spicy and stimulating food, don’t get cold, and pay attention to keeping warm.