If you are pregnant after ovulation, you can usually detect it in 8-10 days. Arrangements for intercourse during ovulation, sperm through the vagina, the uterine cavity to the fallopian tube, at this time in the fallopian tube just have mature eggs, then the sperm can be combined with the egg, fertilization, usually this process takes 24-48 hours. After fertilization, the fertilized egg enters the uterine cavity from the fallopian tube and begins to settle in the uterine cavity after swimming for a period of time, and this process usually takes 3-4 days. Therefore, a woman may become pregnant 3-5 days after intercourse during ovulation, but it is usually not possible to detect pregnancy at this time, and human chorionic gonadotropin (HCG) can only be detected about 8-10 days after intercourse to determine whether pregnancy has occurred. If you want to have children, you can arrange intercourse during the ovulation period, and it is recommended that you have intercourse every other day to improve your chances of conception. During the preparation period, you need to pay attention to protein food and vegetables and fruits, do not stay up late, pay attention to rest, and keep a good mood.