Raf from Florida University in the United States?Doliti studied that the number of sperm for American men has been reduced by almost one -third in the past half century.
In 1929, the middle value of the sperm was 90 million/ml, and the intermediate value of 1979 was 60 million/ml, which means that half of the men's sperm is higher than this number, and half a man is lower than this number.Recently, Professor Doliti investigated 132 male college students and found that 23%of them had less than 20 million/ml.
Sperm that is prone to injury In terms of sperm biological characteristics, sperm is a terminal product developed by the male germ cell line.In the process of sperm, formation, and deformation, due to cytoplasm removal, DNA repair enzymes in cytoplasm are lost, which causes DNA damage and repair system functions to be lost.
Therefore, it cannot repair more than 90%of primary genetic material damage by itself like body cells and egg cells.Among the various cells of the human body, only sperm has this characteristic.In addition, sperm is more sensitive to toxic substances compared to various other cells.
Sperm cells are always in a rapid division, and men will continue to generate sperm from the middle and late stages of embryo to old age.In the process of rapid sperm, the harmful effects of various harmful factors have increased significantly after accumulation and accumulation.
With the deepening of genetic research and understanding in recent years, people are more clear. Compared with X chromosomes, the genes carried by Y chromosomes are more likely to change.
The four principles of "protecting essence" before pregnancy:
1. Maintaining appropriate exercise can not only maintain healthy physical strength, but also effectively decompress.Men with stress can consider exercising for 30-45 minutes a day.It should be noted that the exercise should be prematurely not caused by fatigue, and wearing loose clothes, which is conducive to heat dissipation.
2. The immune ability of regular physical examination vaccines is not as reliable as women.Regular medical examinations can prevent many diseases, but vaccination can prevent some infectious diseases, especially infectious diseases that may affect reproductive health.
3. Learn to clean your men to develop good health habits, because privacy parts are sometimes more likely to hide dirt.Wash the foreskin and scrotum daily; avoid the following activities that last for more than two hours, such as pants that wear tight and breathable -breathable, bath, wash sauna, bicycle, driving, sofa, etc.
4. Men's exercise before pregnancy should be based on not fatigue, and wearing loose clothes, which is conducive to heat dissipation.
(Editor in charge: Internship Chen Xinda)
