Doctor Alicia Stanton from the United States believes that human reproductive function is surprisingly inefficient and the mechanism is very complex. Studies have found that a couple with normal reproductive function has only a 25% chance of conception if they have sexual intercourse without taking any contraceptive measures.
Because a sperm needs to travel a long distance to reach its target. Unfortunately, most of these \”little guys\” can\’t do it. The average speed of sperm movement is about 1 to 4 millimeters per minute. Theoretically speaking, after a sperm is injected into the vagina, it swims forward at full speed. In order to reach the fallopian tube and join the egg, it will take 45 minutes in a short distance of 175 millimeters. minutes to 3 hours.
However, since only 25% to 50% of sperm are in good forward motion, it may actually take up to 3 days for a sperm to reach the egg. So it would really be a miracle for any of them to reach the \”finish line\” alive on time.
Dr. David Shin, director of the American Sexual Health and Fertility Center, has revealed 13 secrets about sperm through years of research. I believe many people have never heard of the knowledge contained in it.
1. Sperm is produced in the testicles and takes 10 weeks to mature.
2. The epididymis is the \”storage bank\” of sperm. It is located on the surface of the testicle and adheres to it. The sperm produced in the testicles enters the epididymis after \”leaving the factory\” and stays in this \”storage bank\” for a full two weeks.
3. In a piece of semen, the volume of sperm accounts for only 5% of the total volume of semen. The remaining part is made up of a liquid component (also called seminal plasma) that provides the sperm with nutrients and a protective medium to ensure that they can swim smoothly and safely through the female reproductive tract.
4. A healthy man’s two testicles produce 70 million to 150 million sperm every day.
5. Sperm can survive in a woman’s uterus for 3 to 5 days, which can explain why having sexual intercourse a few days before ovulation every month may make a woman pregnant.
6. Sperm containing Y chromosome can give birth to a boy. It swims faster than sperm containing X chromosome. Sperm containing an X chromosome gives birth to a girl. The Y chromosome contains less genetic material than the X chromosome, so sperm carrying the Y chromosome run faster because they have a smaller \”transport weight\” than sperm carrying the X chromosome.
7. Human sperm is 55 microns long. human headThe average hair diameter is 100 microns.
8. The English word sperm (sperm) comes from the ancient Greek word sperma, whose original meaning is seed.
9. Sperm can only swim forward, not backward.
10. Normal sperm has a \”head\”, a \”body\” and a \”tail\”. Abnormal sperm may have two \”heads\” and two \”tails\”.
11. In the United States, New York men have the highest sperm count (referring to the number of sperm per milliliter of semen). The results also showed that men in New York had 50% higher sperm counts than men in Los Angeles.
12. Staying in a hot tub or sauna for a long time may reduce sperm count, because a hot environment is not conducive to sperm production.
13. Lubricants, detergents and saliva may reduce sperm activity. Many lubricants have a \”toxic\” effect on sperm, although the product label will not say so. Certain ingredients in lubricants, such as glycerin, are not good for sperm.
From this point of view, it is very miraculous and surprising that the fragile sperm can undergo a very difficult process to combine with the egg.
This article is provided by Baidu Reading. It is excerpted from \”Very Good Pregnancy: You Can Get Pregnant by Doing This\” Author: Yu Yue\’e