To give birth to a healthy next generation, men must understand their important weapons & mdash; & mdash; sperm.The American "Men's Health" magazine wrote the changes in sperm in life.
14 ~ 16 years old: mature sperm appear and have nocturnal emission.
20 ~ 29 years old: This is the most active period for men's life.Every "small tadpole" is ready to conceive the egg at any time.
30 ~ 39 years old: Male androgens have begun to decline, sperm number is lower, and erectiles deteriorate.
40 ~ 49 years old: Every year, your sperm activity decreases at a rate of 0.7%.In order to improve the sperm state, men can supplement vitamin B12 in an appropriate amount.
50 ~ 59 years old: New York University studies prove that if the wife is pregnant, men are over 50 years old, and the child's chance of suffering from birth defects will be 2.1%. It is recommended that he eat more foods rich in folic acid.
Over 60 years old: After 60 years of age, 85%of sperm are deformity.Although there are some cases that are 60 years old, they are divided into two extremes: one is that the baby's physical fitness and IQ are particularly high; on the other hand, the baby is suffering from multiple diseases & mdash; & mdash;common.
Men's sperm only lives for up to 24 hours in the body
Although normal and mature men emit ejaculation at one time tens of millions or even about 200 million sperm, most of these sperm have lost vitality in the acidic environment of female reproductive tract and died.Generally speaking, the life of sperm in the vagina does not exceed 8 hours, and only a small number of sperm is linked and continued to move forward.When the sperm competes to reach the uterine cavity, the number is only 1%& mdash; 5%when ejaculation. Why?Because there are sperm in semen during ejaculation, you can get a large amount of fructose and enzymes in the semen and enzymes that break down sugar. When the sperm enters the uterine cavity, it leaves the semen.It is greatly shortened. The poor quality sperm runs slowly and cannot reach the uterine cavity quickly, and it will lose its vitality.After passing the way, the sperm can eventually reach the tubal fertilization site.
However, as long as the sperm enters the fallopian tube, it has strong fertilization ability.Of course, in the end, only 1 & mdash; 2 sperm was fortunate to be combined with eggs, and the remaining sperm died within 36 hours.However, the sperm stored in the cervical mucosa hidden nest can reach 2 & mdash; 6 days. Although so, its ability to fertilize has basically lost, because most of the sperm's fertilization ability can only maintain for about 20 hours.
