Post Date April, 21 2023
Is ejaculation after sexual intercourse a cause of infertility? Many couples with infertility often believe that this is the reason why they have been married for many years without getting pregnant.
Although the vagina is a cavity surrounded by muscles throughout the body, due to the collection of surrounding muscles, the front, back, left, and right walls of the vagina are all very close, so there is generally not all indoor space left. Only male genital insertion or genital insertion or baby delivery will increase. The deepest part of the vagina is the posterior dome, which can store some liquid, but its volume is limited and does not exceed 2ml. The semen ejaculated during sexual intercourse by males is generally 2-6ml, while the vaginal discharge by females is also 1-2ml. The sum of the two is currently 3-8ml, and the posterior dome of the vagina cannot accommodate that much fluid. So it is normal for semen to overflow from the vagina after male genital withdrawal. Is semen overflow harmful to the human body?
The reference answer is no. According to a survey, 1ml of semen contains 20 to 200 million sperm, and after sexual intercourse, hundreds of millions of sperm flood into the vagina. Sperm shaped like a frog, with a slender small tail that pushes forward according to the swaying tail, but at a slow speed, it can only move forward 2-3 millimeters per minute. The distance from the cervical passage through the uterine cavity to the insemination site inside the bilateral fallopian tubes is about 15 cm, and it takes at least 1-2 hours to reach the site solely by the shaking of the sperm itself. But in fact, 10 minutes after sexual intercourse, you can find some sperm in the fertilized areas of both fallopian tubes.
What is the reason for this? The original semen contains a large amount of prostaglandins, which can cause significant uterine muscle contraction after being digested and absorbed by the vaginal mucosa. The uterus is first collected and then relaxed, and the uterine cavity is under air pressure. Sperm is attracted and enters the uterine cavity. In addition, female orgasm during sexual intercourse can also increase the contraction of uterine muscles, promoting the attraction of sperm into the uterine cavity. However, not all sperm can enter bilateral fallopian tubes, because sperm will encounter many obstacles in the whole process of operation. According to market competition, survival of the fittest, and ultimately less than 200 sperm can reach the fertilization site of bilateral fallopian tubes; These 200 sperm are not the final champions either. In fact, there is usually only one sperm that can fuse with the egg cell, and this sperm is selected from within a billion.
By mastering the entire process of pregnancy, people can clearly state to some people that pregnancy is not necessary to rush out of bed or lay flat after sexual intercourse by placing a pillow under the buttocks, raising the buttocks to prevent semen from flowing out. In fact, sperm with the ability to fertilize after sexual intercourse have already entered the uterine cavity, and only these unnecessary sperm will overflow in market competition. However, methods that restrict semen from overflowing the vagina are inherently detrimental to pregnancy.
Similarly, waking up immediately after sexual intercourse to expel semen or clean the vagina is not a reliable contraceptive method.
