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, and such an environment is completely impossible for microorganisms and sperm to survive. Although semen contains certain alkaline substances (such as the secretion of the seminal vesicle gland) that can play a certain neutralizing role when sperm enter the vagina, ejaculation is a one-time event, while the acid in the vagina is continuously produced. So, stay too long and you’ll just die! 2, exhausted from swimming Sperm is about 60 microns long, while the length of a woman’s vagina is 8 cm (80,000 microns). If not for ejaculation, just the vaginal distance is enough for the tadpoles to trek. In addition, they have to break through the cervical mucus and other barriers, so if they are not well, they will die before they see the shadow of an egg! 3, lost and dizzy Usually, women only discharge one egg cell at a time, with both ovaries alternating ovulation. This is too sad for the sperm – two fallopian tubes, “fork in the road” there are no signs, there is always a part of Mr. sperm running the wrong way, embarked on the road of no return that can never meet the egg. 4, on the wall, on the ground thirsty death during sexual intercourse, after ejaculation into the vagina sperm can survive for about 5 days. However, if you spill the seeds on the wall or floor, they will have a much shorter life! 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 dead Many people know that the reason the testicles hang outside the body is to maintain a lower temperature to ensure the normal production of sperm. Temporary poor heat dissipation can lead to a decrease in the quality of sperm over a period of time, while if it is hot and stuffy for a long time, it 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’s evil idea of hooking up with the egg basically fizzled. They will have to spend the rest of their lives miserably in latex containers. 9. Vasectomized and 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 storehouse 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, the sperm stored for a long time will degrade due to aging and inactivation, such as deformation of the acrosome, changes in DNA content and chromosomes, etc. 13, ultrasound “noisy” dead Researchers at the University of North Carolina found that ultrasound can significantly reduce the number of sperm in the testes of rats.