1. Acidic in the vagina The pH in the vagina is about 4,0, and such an environment is completely unviable for microorganisms and sperm. Although semen contains some 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, they have to break through the cervical mucus and other barriers, so if they are not in good health, they will buckle before they 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 miserable 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 about 2-3 days. However, if you spill the seeds on the wall, the ground, their lives will be much shorter! Exposed sperm 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 high heat, 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 to hook up with the eggs MM evil ideas basically fizzled out. 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 are ligated. This prevents the sperm from being produced from the testicles, let alone combining 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 spirochete possession hanging off Syphilis spirochete is a small, slender, end-tip spiral microorganism, people are mainly transmitted through sexual contact, placenta, birth canal and other ways, there are very few people through non-sexual contact, blood transfusion, indirect contact and other ways to be infected. 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 be degraded by aging and inactivation, such as deformation of the acrosome, changes in DNA content and chromosomes, etc.