Everyone knows that sperm are born in the testicles, but where do they die? 1. They die in the vagina by acid. The pH of the vagina is about 4.0, which is a completely unviable environment for microorganisms and sperm. Although semen contains certain alkaline substances (such as the secretion of the seminal vesicle gland) that can play a neutralizing role when sperm enter the vagina, ejaculation is a one-time event, while the acid in the vagina is continuously produced. So, if you stay too long, you will die! Sperm is about 60 microns long, while the length of a woman’s vagina is 8 cm (80,000 microns). If not for ejaculation, the vaginal distance alone is enough for tadpoles to trek. In addition, there are obstacles such as cervical mucus to break through, so if you are not in good health, you’ll be in trouble before you see the shadow of MM’s egg! The body is the capital of the revolution, this is not bad at all ah! 3, lost fainting to death In general, women only expel one egg cell at a time, alternating between the ovaries ovulation. This is too sad for the sperm – two fallopian tubes, “fork in the road” there is no sign! It’s intentional! There are always some sperm that run the wrong way and set out on the road of no return where they will never meet the egg. As for those sperm that go in from the tube that is impossible to fertilize …… is a tragedy! 4, on the wall, on the ground thirsty death Sexual intercourse, by ejaculation into the vagina sperm can survive for about 5 days. However, if you spill the seeds on the wall, on the ground, their lives will be much shorter! Sperm exposed to the air will die of dehydration within minutes! 5, killed by smoke, drunk by alcohol The nicotine in cigarettes interferes with the secretion of sex hormones in the male body and has a direct killing effect on sperm. In addition, long-term heavy drinking, will also affect sperm development. 6, heat death The earth knows that the reason why the balls hang outside the body is to maintain a lower temperature to ensure the normal production of sperm. Temporary poor heat dissipation will lead to a decline in the quality of sperm over a period of time, while if the long-term sweltering heat will greatly affect the viability and quality of sperm. 7, radiation shot dead Ionizing radiation can produce some degree of damage to various cells in the human body. Sperm, of course, can not escape. 8, hit the condom dead If unfortunately hit the condom, Mr. sperm to hook up with the eggs MM evil ideas basically fizzled out. They can only spend the rest of their lives miserably in latex containers. 9. Vasectomies that are swallowed by macrophages Vasectomy is a sterilization method in which the vas deferens is cut off and then ligated (sounds painful). As a result, the sperm produced from the testicles can no longer exit the body properly, let alone unite with egg cells. So where do these sperm go? Observations in humans have found that macrophages engulf the sperm after vasectomy. However, other ways of sperm eradication have been found in animal experiments, for example, the epididymis of cattle can reabsorb 50% of the daily sperm production. 10, syphilis spirochetes possessed hanging off Syphilis spirochetes are small, slender, spiral-shaped microorganisms with pointed ends, people are mainly infected through sexual contact, placenta, birth canal and other ways, and a very small number of people are infected through non-sexual contact, blood transfusion, indirect contact and other ways. The sperm infected by syphilis spirochetes, survival rate and mobility are lower than normal sperm, and easily produce malformations. 11, killed by spermicide In fact, not only the spermicide that people actively use for contraception, there are many other substances in life that can threaten human sperm in the dark. Pollutants in the air, or drugs used to treat cancer, can be toxic to sperm. 12, squatting at home and dying at home! The epididymis is the reservoir of sperm. The sperm that comes out of the testicles must be stored in the epididymis for a certain amount of time before it has the ability to fertilize an egg. However, sperm stored for a long time will undergo degradation changes due to aging and inactivation, such as deformation of the acrosome, changes in DNA content and chromosomes, etc. And, you know, …… 13, ultrasound “noisy” dead; University of North Carolina researchers found that ultrasound can significantly reduce the number of sperm in the testes of rats. For more information, see New Contraceptive Options? “Noisy” dead sperm it! 14, was urinated to death …… when retrograde ejaculation occurs, the sperm will enter the bladder, and then …… read the above, I believe that about why sperm easily hundreds of millions of eggs but all alone this problem, we have a deeper understanding.