When does a man’s sperm have the highest quality?

　　The golden age of childbearing for men aged 30

　　male growth and development relative to female Later, sexual maturity is delayed, and physical strength and experience reach their peak relatively late. Generally speaking, the golden age for women to have children is between the ages of 23 and 30. During this period, the number and quality of women’s eggs are much higher. Then, men’s sperm At what age will your quality reach its peak?

　　According to relatively independent surveys in the United States, Switzerland and other countries, men's sperm quality will reach its peak around the age of 30. At this time, men have relatively rich physical strength, energy, and life experience. The quality of genetic information contained in sperm is the best and the activity is the strongest.

　　The report pointed out: 30 to 35 years old is the best childbearing age for men, because men in this age group are in their prime. In addition to the internal advantages of excellent physical fitness, other external advantages, such as economic and career stability, superior material conditions for raising children, and mature psychological endurance. Although men have the ability to be fathers throughout their lives, from a eugenic perspective, it is better not to exceed the age of 35. The quality of a man's sperm reaches its peak at the age of 30, and then continues for 5 years until the age of 35, after which the quality declines.

　　Although male growth and development is finalized by the age of 25, male sperm has not reached its peak at this stage. Physical strength, experience, and social experience are all in the primary stage, and the DNA information contained in the sperm is not perfect. Therefore, the younger the male’s sperm, the better.

　　Sperm quality plummets after age 35

　　American scientists have discovered that the age of 35 is a watershed for male sperm quality. Men over this age have a much higher rate of genetic mutations in their sperm. This finding may be the best explanation for the plummeting fertility rate among men over the age of 35. Previously, a common view was that if a professional woman focused too much on her career, she might have to sacrifice her ability to be a mother, because the quality of women's eggs gradually declines with age.

　　However, molecular studies conducted by researchers at the University of Washington in Seattle also show that career men who intend to have children should also worry about age. Men over 35 years old will be less likely to have children.

　　The research was led by scientist Narendra? Initiated by Singer, the research team conducted a follow-up study on the semen of 60 volunteers aged between 22 and 60 years old. healthy , the number of sperm in semen is normal. Singer found that although the sperm counts of men of different ages are roughly the same, their genetic quality is closely related to age, and 35 years old is a key dividing line. Molecular tests on the semen of older men have shown that the concentration of DNA double helix damage in their sperm is much higher, and the chance of genetic damage is greater. Moreover, the immune system function of the sperm is also relatively low, making it difficult to use the self-elimination mechanism to eliminate defective sperm.

　　In addition, the mobility of sperm in the semen of older men is relatively weak. Of course, the scientists who led the study pointed out that this finding does not mean that men over the age of 35 have a hard time becoming fathers, especially if their partners are relatively young, they can still fulfill their father's wishes. In fact, statistics do not support this conclusion. For example, in the 1990s, the proportion of British men over 40 who became fathers increased by half, and in 1999, about 10% of new students became fathers. baby The father is over 40 years old. Therefore, Singer emphasized that this latest study is actually to explore the relationship between older couples. infertility Opened up a new angle.

　　What "things" do men lose after the age of 35?

　　Sperm quality declines after the age of 35: Although the sperm of older men does not age and has even higher density, their mobility has declined significantly. The number of immobile and deformed sperm has increased by 20%. The speed of sperm metabolism has also declined. After metabolism, a lot of waste is produced. The adverse effects on future generations can be imagined.

　　As a man ages, his sperm, like his eggs, not only develop genetic problems, but their ability to fertilize an egg is greatly reduced. The older a man is, the worse his sperm quality is, and the more genetic variation there is, the greater the possibility of disaster and disease.

　　Sex hormones decay after the age of 35: After a man reaches the age of 35, the male hormones in his body also begin to decay. On average, his testosterone secretion decreases by 1% every year. Therefore, like women, men also have a reproductive biological clock, but men’s reproductive biological clock is more flexible.

　　High mental pressure after the age of 35: 35-year-old men often have little success at work, which means they have to endure greater pressure and a more complex workplace environment. The increase in work and entertainment also means that they often need to be exposed to tobacco and alcohol. Stress, nervousness, smoking, drinking, etc., will interfere with the development and quality of sperm. Whether it is abnormal changes around the sperm or minor changes in the sperm itself, it may lead to failure of eugenics, infertility, birth defects, and even miscarriage, stillbirth, premature birth , stillbirth, and various congenital anomalies or congenital malformations of different natures and types.

　　The younger a man is, the worse the quality of the sperm he produces. The sperm produced by the age of 25 is basically fully mature. The sperm produced by the age of about 30 is of the highest quality and has the strongest vitality and can pass on the best genes to the next generation. However, it is also disadvantageous for men to have children who are too old. The incidence of congenital malformations and genetic diseases among their children is also higher. Genetic eugenicists believe that if the age of a couple is that the man is 2 to 3 years older than the woman, and the man is about 30 years old and the woman is about 27 years old, both parties are at their best childbearing age.