Women who have irregular menstrual periods are not easy to get pregnant, because irregular menstrual periods are difficult to grasp the time of ovulation, so you can’t grasp whether the intercourse is to catch up with the ovulation period when the intercourse, so it is relatively difficult to get pregnant. However, it is also recommended to monitor the growth and development of follicles through ultrasound, to understand when the approximate ovulation and then guide the coitus, will also improve the chances of pregnancy. It is recommended that after the follicle reaches the dominant follicle, for example, the follicle’s diameter is about 18mm, you can choose to have intercourse, the vast majority of such cases may be ovulated every other day, and the sperm will survive for up to 3 days after being ejaculated into the vagina, so when the sperm is still alive at the time of ovulation, the sperm and the egg will have the opportunity to combine to form a fertilized egg, and then you will get pregnant.