Is there a “menopause”? How old are men before they become infertile? Many people are curious. After all, women have menopause, menopause, and lose their fertility at an early age, and it’s not uncommon to see news of the oldest old getting a child at a later age, so is there no upper age limit for male fertility? Men too old to have children will bring adverse effects? To listen to what male doctors say. First, male fertility Male fertility cycle is longer than women It is well known that the best age for women to have children is 25 to 35 years old. As women get older, their fertility gradually decreases, and the onset of menopause causes women to lose their fertility completely. At the time a woman reaches the age at which she experiences a decline in fertility, men of her age or older do not experience a significant decline in fertility. Most of the literature and guidelines on the risk of delayed childbearing emphasize the age factor for women, while ignoring or not even mentioning the age risk for men, because men have longer reproductive cycles than women. Men do not go through menopause Women go through menopause. Once they go through menopause, their ovaries function very poorly and they no longer ovulate, which means that they have lost their fertility. Men, on the other hand, do not go through menopause and therefore have a longer fertility cycle. Male fertility generally refers to the spermatogenic function of the testes, although the erectile function of the penis also plays an important role. During puberty, the testes grow larger and produce sperm, and at around 18 years of age, the reproductive organs and secondary sexual characteristics reach maturity and fertility reaches its peak. Thanks to the presence of spermatogonial stem cells in the testes, the male testes can continue to reproduce and differentiate spermatozoa. It can be said that life goes on and sperm production does not stop. Normal male fertility can be maintained for a long time, and some scholars believe that fertility will gradually diminish after the age of 55. From clinical practice, testicular elasticity is still very good in men around 50 years old, and its volume has not been reduced. After 60 years old, the testicles gradually become softer and their volume is reduced, and the total number of spermatozoa, their vitality and normal morphology rate begin to show a decreasing trend. As men age, serum testosterone concentration decreases significantly, and this decline is sometimes referred to as “male menopause”, which is medically known as “delayed-onset hypogonadotropic hypogonadism”. This decline is sometimes referred to as “male menopause” and is medically referred to as “late-onset hypogonadism”. Symptoms associated with testosterone deficiency, such as night sweats and fatigue, loss of libido, and decreased sexual functioning, can result in a decrease in fertility. Instead of a decrease in fertility, it is a decrease in sexual function. Secondly, does the father’s old age have any effect on the child? As men get older, the cumulative incidence of chromosomal aberrations and mutations in their germ cells gradually increases. According to the literature, the rate of sperm DNA fragmentation in the group of men aged 36 to 57 is three times higher than that in the group of men under 35. As a result, there is a decrease in the rate of spousal pregnancy and an increase in the rate of spontaneous abortion, among others. A large-scale Danish study of several births of newborns found that the older the father, the more newborns with cleft lip and palate defects were born to his offspring. Other studies have found that childhood brain cancer, leukemia, and an increased risk of schizophrenia in the offspring in adulthood may also be related to the father’s age, but the findings of these studies remain somewhat controversial. Also, even though the risk of genetic defects rises in the offspring of older fathers, the individual risk is still relatively small and there is no need to be overly concerned. Therefore, children born to men at the time of their best fertility have a low rate of genetic defects, and younger fathers can be with their children longer. Third, how to delay the decline in fertility 1, the country have canceled the reward for late marriage and late childbearing, do not delay the age of childbearing, of course, it is important to balance the relationship between work, study and family. 2. The best age for women to have children is 25 to 35 years old, so please conceive children in the best age for women to have children. 3.If you are planning to have a second child without success and your lover is over 35～40 years old, please don’t blame her, take her to a regular hospital to do a good assessment of her fertility status, and if necessary, you can get pregnant soon with the help of in vitro fertilization (IVF) technology. 4.Eat some foods that are good for your health (green vegetables, fruits, nuts and other foods rich in vitamins and trace elements), keep a good mindset, insist on aerobic exercise, control your weight, stop smoking and limit alcohol.