56-year-old baby is not a new thing, 90 years old or even 100 years old to give birth to a child news is also heard from time to time. Chinese ancient books have long been “eighty old man gave birth to a child” records, there are also modern live examples, such as 20 years ago in Guangxi, a nearly 90-year-old birthday boy on the happy father. Such examples abroad are also common, such as the Soviet Union, a farmer called Ahanhel, married and gave birth at the age of 112, which is probably the world’s Guinness Book of Records for the birth of a man of advanced age. But that’s not to say that fertility has nothing to do with age. Researchers at the Center for Reproduction took sperm samples from more than 12,000 couples with about 21,000 examples of intrauterine insemination procedures, checked sperm quality and tracked pregnancy, miscarriage and fertility rates for women, and found that pregnancy became harder and the risk of miscarriage increased for women over the age of 35, while a similar effect was seen for men over 40. Researchers speculate that it may have something to do with the fact that men’s increasing age tends to lead to breaks and declines in the deoxyribonucleic acid of sperm. 1, 35 years old is a watershed for male sperm quality American scientists have found that 35 years old is a watershed for male sperm quality. The quality of sperm, for example, although older men’s sperm does not age, and the density is higher, but the rate of genetic variation in sperm has increased greatly, sperm mobility has significantly decreased momentum, the number of immobile and deformed sperm increased by 20%. In addition, the rate of sperm metabolism has also declined, and a lot of waste is produced after metabolism, all of which has a negative impact on fertility. As men age, the ability of sperm to fertilize an egg is greatly reduced. At the same time, after the age of 35, the body’s androgenic hormone also began to decline, the average testosterone secretion of each year after the 1% decline. Therefore, men also have reproductive “biological clock”, but the reproductive “biological clock” of men is more flexible. 2, the male prime fertility period: 25-35 years old Women’s prime fertility age is 20-30 years old, male growth and development is relatively late in women, sexual maturity time delayed. 25-35 years old is the best childbearing age of men, because this age of men just young and strong, in addition to good physical quality of this internal advantage, other external advantages, such as economic, career tend to be stable, child rearing The material conditions are superior and the mental capacity is mature. Although men have the ability to be fathers throughout their lives, but from the eugenics point of view, it is not advisable to exceed 35 years old. 3, sex can improve the cardiorespiratory function of middle-aged men Sex itself is a good way to exercise and has a positive effect on heart health. The U.S. Medical College of Pennsylvania research that: sex is equivalent to jogging. If you have sex 3 times a week, it is equivalent to jogging 75 kilometers in a year, and the caloric energy burned is 7,500 kilocalories. Regular sex can promote metabolism, sex this bed exercise in unconsciously deepen the breathing, thus increasing the amount of oxygen intake of the heart and lungs. 4, prepare for pregnancy male supplement vitamin C Prepare for pregnancy is not a woman’s business, men can increase the intake of vitamin C to increase the chances of fertility, some studies have shown that the daily supplement vitamin C can increase the chances of fertility in men who smoke. Low levels of vitamin C in the body may cause sperm to collect in one place. It is appropriate to take 1 to 1.5 grams of vitamin C per day. oranges, watermelon, melons, strawberries and kale, tomatoes and Brussels sprouts are better sources of vitamin C. Warm tip: Couples in preparation for pregnancy must realize that preparation for pregnancy is a matter for two people, and male friends should not think that they are infallible in everything, and actively make a baby when the quality of sperm is in its prime.