This is determined by the woman’s menstrual cycle and ultrasound test results. When a woman is ovulating, her chances of getting pregnant are higher. The ovulation period of a woman can be calculated according to her menstrual cycle, but of course, this is based on the premise that her menstrual cycle is relatively regular. Generally speaking, women ovulate about 14 days before their next menstrual period and have a higher chance of getting pregnant during intercourse at this time. If a woman’s menstrual cycle is not particularly regular, it may be necessary to use the ultrasound results of the early pregnancy period to make a projection.