On the first day after ovulation, you can do ultrasound to monitor the follicles to see if the follicles have successfully ruptured and expelled the eggs. Normally, a woman’s menstrual cycle is always regular, once every month is 28-30 days, and the ovulation day should be on the 14th day before the next menstruation, which is about 15 days after the menstruation, which is the ovulation day. You can start to monitor your follicles with ultrasound on the 12th day after your period, and check every other day to see if the follicles are mature enough to expel the eggs, and you should be able to monitor the eggs on the first day after the ovulation day. Ovulation in women is affected by many factors, such as environmental changes, mental stress, hard work and depression, which can easily cause ovulation to advance or postpone. Ultrasound follicle monitoring should be started earlier and done more often for better results.