You can have sex when a woman is ovulating, which makes it easier to get pregnant. You can use ovulation test paper to monitor ovulation, starting on the 5th day of menstruation, once a day. If the ovulation test paper turns out to be 1 strong bar and 1 weak bar, this situation indicates that ovulation has already occurred. During sex, the woman should lie down for 30 minutes and elevate her hips, which is more conducive to pregnancy. You can also use pelvic ultrasound to monitor ovulation. The ultrasound can clearly see the growth of the follicle, when the follicle reaches about 2cm, it means the egg is mature.