Fertilization takes place in a split second, but the process requires sperm to be energized, then enter the fallopian tube and meet the egg, unite to form a fertilized egg, and then return to the uterine cavity for implantation, which takes a slightly longer time, usually 5-6 days. The egg is usually mature and ovulates, and the egg is usually alive for no more than 24 hours. The fertilization rate is high for the first 12 hours after ovulation and extremely low after 12 hours. After the semen enters the female reproductive tract, it takes about 7 hours to liquefy and gain energy. The duration of sperm survival varies, from 1-2 days to 5-6 days. The sperm and egg meet to form fertilization, and successful fertilization automatically swims through the fallopian tubes to the uterine cavity where implantation is completed, usually taking 5-6 days. Therefore, overall, the fertilization process usually takes about 1 week. For most women, pregnancy can be determined by a blood test after more than 1 week of delayed menstruation, based on the blood HCG value. Take care to take folic acid in early pregnancy to prevent fetal neural tube abnormalities. It is forbidden to have sexual intercourse in the first 3 months of pregnancy to avoid miscarriage.