The chances of conception are highest 12 hours after the egg is discharged, and the chances of conception are relatively high 1-2 days before the day of ovulation and 1-2 days after the day of ovulation, provided that there are no abnormalities in the sperm, fallopian tubes, and so on. After the egg is discharged, the egg is in the female reproductive tract, and the survival time is usually 1-2 days, so pregnancy after ovulation usually occurs within two days after ovulation. During ovulation, especially having sex 2 days before and after the day of ovulation, the chance of pregnancy is the highest, once ovulation occurs after having sex, the chance of conception will be greatly reduced. Therefore, it is generally believed that the chances of conception are within about 12 hours after a mature egg is released. When the sperm and egg combine in the fallopian tube, they will be sent through the peristalsis of the fallopian tube into the uterine cavity of the woman. Generally, about 7-10 days after ovulation, if pregnancy occurs, pregnancy can be detected through blood test and hcg. Clinically, in order to minimize errors and excessive tests, if there are no uncomfortable symptoms, pregnancy-related tests will usually be conducted after delaying menstruation for about a week. If you want to clarify whether you are pregnant or not, it is best to choose the appropriate test and time under the guidance of your doctor.