What are the reasons for the poor fertility of older men?

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Causes of poor fertility in older men

Nowadays, more and more men choose to have children later. However, with the growth of age, the fertility of men tends to decline gradually. So, what are the reasons for the poor fertility of older men? From many aspects, some explanations can be found.

Increased genetic mutation rate

With the increase of age, men's DNA damage, mutation and repair ability will gradually decline, which will have a negative impact on the quality and quantity of sperm. The study found that men aged 40 were twice as likely to carry new mutations as men aged 20. These genetic mutations may lead to abnormal sperm development, affect fertilization and embryo development, and thus reduce the fertility of older men.

In addition, the sperm quality of older men will also be affected. Research shows that the sperm quality of men over 40 years old will decline, including sperm quantity, mobility and morphology. These abnormal sperm will have adverse effects on fertilization and embryonic development, increasing the difficulty of reproduction.

In view of the increase in genetic mutation rate and the decline in sperm quality, one of the reasons for the poor fertility of older men can be attributed to genetic factors.

Hormone level changes

The hormone levels in men also change with age. In particular, the decrease of testosterone level may have a certain impact on fertility. The study found that with the increase of age, the testosterone level of men will gradually decline, which may lead to the reduction of sperm production and quality.

In addition, the decrease of testosterone level may also affect male sexual function and libido. This is also an important factor for the poor fertility of older men.

Lifestyle and environmental factors

Male lifestyle and environmental factors will also affect fertility. For older men, working pressure and life pressure may affect their physical and mental status, and then affect their fertility in a high-pressure working environment for a long time.

In addition, long-term exposure to environmental pollutants, such as heavy metals and pesticides, may also have a negative impact on male fertility. These harmful substances may damage sperm DNA and lead to the decline of sperm quality.

Bad lifestyle, such as unhealthy diet and lack of exercise, will also have a negative impact on male fertility. Therefore, it is very important to improve the way of life and reduce environmental pollution for improving the fertility of older men.

Medical technology and assisted reproductive means

Although the old age of men will affect their fertility, modern medical technology and assisted reproductive means provide the possibility to solve this problem. For example, through sperm cryopreservation technology, men can freeze sperm for future use in a period of good fertility. In addition, assisted reproductive technologies such as in vitro fertilization and intrafallopian fertilization can also help older men achieve their reproductive aspirations.

To sum up, the reasons for the poor fertility of older men mainly include the increase of genetic mutation rate, changes in hormone levels, lifestyle and environmental factors, and medical technology. Although age has a certain negative impact on male fertility, by taking some measures, such as improving lifestyle, reducing environmental pollution and using medical technology, men can still realize their desire to give birth at an advanced age.