Female genital tract is full of viscous liquid, and the mucosa of oviduct isthmus forms tortuous folds, which causes great resistance to sperm transport and plays a role in screening sperm. Only sperm with strong exercise ability and proper exercise mode can reach the position of oocyte.
Extended data
Six fears of sperm:
1, afraid of cigarettes+alcohol
Nicotine can not only reduce the secretion of male sex hormones, but also directly kill sperm. Long-term heavy drinking will make 70% sperm stunted or lose vitality.
2. Fear of hunger
Being picky about food and not eating animal food will reduce the zinc content in the body for a long time. Zinc deficiency will reduce sexual desire and sexual function, and the number of sperm will decrease.
3, afraid of heat
The scrotum temperature is usually 65438 0-2 degrees Celsius lower than the body temperature. If you have a hobby of soaking in hot water, your sperm production will decrease.
4. Fear frequency
Frequent sexual intercourse will reduce the number of sperm in each ejaculation. If there are less than 20 million sperm per milliliter of semen, the chance of pregnancy will be very small.
5. Fear of worry
Depression or worry all day will directly affect the nervous system and endocrine function of the body, make the spermatogenic function of the testis disorder, and lead to infertility.
6, afraid of medicine +X-ray
Some drugs are harmful to sperm, and high dose radiation will cause chromosome aberration of sperm.
Baidu Encyclopedia-Sperm has six "fears"
Baidu encyclopedia-sperm