The ability to get pregnant in the first half of the month is determined in detail by each woman’s menstrual condition and ovulation, including whether intercourse is performed in the first half of the cycle or in the second half of the cycle. For example, each woman has a different body type and different hormone levels. If ovulation is relatively early, 2-3 days after menstruation, the chances of pregnancy are very high if intercourse is performed in the first half of the cycle. For example, if ovulation is in the second half of the cycle, 1 week before menstruation, some women ovulate during the luteal phase and then have intercourse, which may also cause the chance of pregnancy later. Generally speaking, most women ovulate in the middle of the cycle, so as long as they do not have intercourse during ovulation, the chances of pregnancy are relatively small. If you want to determine whether you are pregnant or not, you can buy an early pregnancy test about 12 days after intercourse to rule out the chance of pregnancy.