Sperm can be detected in a woman’s body in 1-2 days. Usually, sperm survive in the body for about 48 hours and up to 72 hours. The DNA test is generally used to check the sperm in a woman’s body. If the sperm unites with the egg, pregnancy can usually be detected in 7-10 days. The survival time of sperm in different parts of a woman’s body varies. The survival time in the vagina is usually only 2 hours, while it is longer in the fallopian tubes, up to 24-72 hours, so sperm can be detected in a woman’s body in 1-2 days, usually no more than 3 days. Usually about 10 hours after ejaculation is the time when sperm are most active and have the strongest fertilization ability. After men and women have sex, sperm will enter the fallopian tube through the vagina, cervix and uterine cavity, and sperm and egg will unite in the abdomen of the fallopian tube to form a fertilized egg, which is then transported to the uterine cavity for implantation, at which time the trophoblast secretes human chorionic gonadotropin, a process that usually takes 7-10 days, so at 7-10 days you can This process usually takes 7-10 days, so the hormone levels can be checked by blood or urine tests at 7-10 days. The vagina of women is an acidic environment and the survival rate of normal sperm in the female vagina is low. The survival time of a few sperm can be prolonged by buffering the semen.