If the usual monthly menstrual cycle is about 28-30 days, the day of ovulation is about 14 days before the next menstrual period, which is called the ovulation period. If you have intercourse during this time after ovulation, you will easily conceive. If your menstrual cycle is irregular, it is usually about 14 days before your next menstrual period. If the menstrual cycle is irregular, sometimes short, sometimes long, you can’t tell if it’s ovulation based on this time, it’s possible to get pregnant at any time. Therefore, if you have irregular periods, it is recommended to use good contraception. If you want to get pregnant, it is recommended that you go to the hospital on the tenth day of your period to have your follicles monitored by ultrasound, and the doctor will guide you to have intercourse to make it easier to conceive.