During sexual activity, men will talk about sperm ejaculating into women's bodies. The survival time of sperm in the female body is limited to a certain number of days, and there are significant differences in the survival of sperm in different locations within the female body. Generally speaking, sperm appear in the vagina, cervix, and fallopian tubes of women. This article will provide a detailed introduction to the survival time of sperm in different locations.
1. Sperm retains time in the female reproductive tract
The pH of vaginal acidic secretion is usually 3.5-4. Although in theory, fertilization can be achieved with just one live sperm, in reality, in the acidic environment of the vagina, most sperm die shortly after entering. Only with a certain amount of semen buffering can the survival time of a very small number of strong sperm be extended, giving them the opportunity to enter the uterus and fertilize.
Without the sacrifice of a large number of sperm and a certain amount of semen buffering to improve the acidic and alkaline environment in the vagina, it is impossible for a single sperm or a very small number of sperm to survive and fertilize in the acidic environment of the vagina.
In general, the survival time of sperm in the vagina is: 2 hours after sexual intercourse, 90% of them die; 36 hours, I can't even see the dead. In the vagina of pregnant women, the stronger the acidity, the faster the sperm die.
2. The retention time of sperm in the cervix
The changes in the acidity and alkalinity of cervical mucus have a significant impact on the penetration of sperm. When the pH is less than 6.5, sperm activity stops. At pH 7, there is mild penetration ability, and at pH 7.5, penetration ability is normal, pH8。 At 2 o'clock, the penetration ability is stronger.
There are many mucus blockages at the cervical opening, which prevent many sperm from penetrating and dying outside. Cervical mucus is thick and tough just after menstruation; As ovulation approaches, due to an increase in estrogen levels in the blood, mucus becomes more abundant, clearer, and the degree of aspiration increases; During ovulation, the mucus volume increases, becomes clearer, and flows out, making it easier for sperm to penetrate.
Sperm penetrates cervical mucus through enzymatic hydrolysis. Trypsin and hyaluronidase can hydrolyze cervical mucus, reduce viscosity, and lose the formation of sticky filaments, which is beneficial for sperm passage.
In general, the survival time of sperm in the cervix is: within the cervix, sperm can be found in the cervical mucus 15 minutes after sexual intercourse; After one hour, the sperm enters the inner opening; In the uterine cavity, there are sperm within 1 hour after sexual intercourse. After 6 hours, all the sperm are active. After 12 hours, 5/6 of the sperm are still alive, and after 36 hours, 1/4 of the sperm are still alive. After three days, there is no sperm left alive. But sometimes individual sperm have a particularly long survival time.
3. The retention time of sperm in the fallopian tubes
In the fallopian tubes, there are active sperm after 14 hours of sexual intercourse, and sometimes there are still active sperm after 35 days. Generally, the most active sperm are those who have been in the fallopian tubes for 14 days, and some may enter the abdominal cavity. Those with delayed movement are pushed back into the uterine cavity by cilia flow.
This article provides a detailed introduction to the survival time of sperm in different parts of the female body. If you are a normal male, then the survival time of your sperm in the female body will be very long. Sperm can survive for the longest time in the fallopian tubes, even up to 35 days.
