The main role of sperm is forward movement and fertilization of the egg, by which it delivers genetic material into the oocyte. During sexual intercourse, semen is ejaculated into the vagina and the spermatozoa swim out of the seminal plasma through the cervix, the uterine cavity, the isthmus of the fallopian tubes, and finally to the juxtaposition of the fallopian tubes where they meet the oocyte.
The female reproductive tract is filled with a viscous fluid, and the mucous membrane of the isthmus of the fallopian tube forms zigzag folds, which pose a great resistance to the transportation of sperm, and also plays a role in eliminating and screening sperm, so that only sperm with strong motility and proper motility will be able to arrive at the location of the oocyte.
Expanded
Six fears of sperm:
1, afraid of tobacco + alcohol
Nicot only can reduce the male body sex hormone secretion, the sperm also has a direct killing ability. Long-term large amounts of alcohol will make 70% of the sperm stunted or inactivated.
2, afraid of hunger
Partiality and picky eaters do not eat animal food, day after day will make the body containing zinc decreased. The lack of zinc will make the libido and sexual function decline, sperm count decline.
3, afraid of heat
Scrotum temperature than the body temperature is usually lower than 1-2 degrees Celsius, such as hot bath hobby, will make the sperm production decreased.
4, afraid of frequency
frequent intercourse will make each ejaculation of semen sperm volume decreased, if each milliliter of semen less than 20 million sperm, the chances of pregnancy will be very small.
5, afraid of worry
The day-to-day in melancholy or worry, can directly affect the body's nervous system and endocrine function, so that the testicular spermatogenic function disorders, resulting in infertility.
6, afraid of drugs + X-ray
Some drugs have a damaging effect on the sperm, large doses of radiation can cause chromosomal aberrations in the sperm.
Baidu Encyclopedia - Sperm has six "fear"
Baidu Encyclopedia - Sperm