Does a man have a fixed number of years of fertility? On this issue, many examples, scholars' research experiments, and analytical statistics strongly demonstrate that there is no upper age limit for men's fertility, but there are also cases where, like older women, their children have a high rate of dementia and malformations.
Since ancient times, it is well known that when women reach menopause, they no longer ovulate and lose their fertility after menopause. According to medical statistics, it is known that children born after the age of 35 years of women have a high rate of Mongolian dementia or malformed babies, and should be avoided as much as possible.
So, what about men? Does a man have a fixed number of years of fertility? On this issue, many examples, scholars' research experiments, and analytical statistics strongly demonstrate that there is no upper age limit for men's fertility, but there are also cases where, like older women, their children have a high rate of dementia and malformations.
An elderly couple, a young wife, gave birth to a Mongolian dementia child after two years of marriage. The old man believed that he was over the age of antiquity and was no longer fertile, so he suspected that his wife was unfaithful to him. They often rub and produce many unpleasant things, making them restless. Regarding the fact that my husband is still able to have children, when I spoke about the issue of "retirement of the testicles" on the "Lively Beauty" program of ATV, I mentioned that the fact that a 120 year old man in the UK was still able to conceive a woman was a good example. Therefore, the old man really need not have doubts about his wife.
In response to the question of the number of years a man has given birth, Marx of Munich? The Planck Research Center conducted an interesting experiment. They compared 20 grandfathers aged 60 to 89 with 20 fathers aged 24 to 33. After placing the sperm worms and vole eggs of these two groups of men together and adding some enzymes, it was found that the binding rate of both groups reached 54%, indicating that the sperm worms of the elderly do not age. The semen of the two groups of men was then further analyzed. The results showed that the grandfather group had an average sperm density of 120 million per milliliter, while the parent group had only 78 million. The same results were found in the study conducted by Professor Schering of Hamburg. He also found that although the density of sperm worms in the semen of elderly people is high, their activity is significantly reduced. The number of immobile and malformed spermatozoa increased by 20%. In addition, the concentration of fructose required for sperm metabolism also decreased, and the metabolic waste increased.
How to determine a man's "youth level" clinically? At the symposium on men's physiological aging held in Berlin, it was pointed out that the hardness of the testes, the frequency of sexual intercourse, and the physical condition of the whole body (such as hypertension, diabetes, heart disease or asthma) should be considered. When necessary, blood should be drawn to measure the concentration of male hormones as a supplement. According to the curve drawn by thousands of clinical observations, the age of 31 should be the peak of male "youth level".
In a questionnaire survey of 250 men aged 60 to 70 conducted by Munich psychiatrist Kockett, it was found that there is a close relationship between sexual life status and marriage in the elderly. Only 7% of the 101 single elderly have sex. Of the 149 elderly couples, 54% still maintain sexual activity about 1 to 3 times a week. At 75 years old, it gradually decreases. The key here is that men's sexual interests are "sharpening and profiting", and those who are sexually active when young are more able to maintain their sexual lives in old age.
In summary, there is no upper limit on the reproductive capacity of men. However, as men age, the quality of semen is poor, and the quality of sperm is related to the quality of embryos. Too poor sperm and embryos formed from eggs often cause early miscarriage, which also affects the quality of the next generation.