What is the reason for oligospermia as you age?

Oligospermia caused by aging is mainly related to factors such as decline in testicular function, changes in hormone levels, the impact of chronic diseases, bad living habits, and exposure to environmental toxins. Sperm quality gradually declines after the age of 35, and the risk of oligospermia increases significantly after the age of 50.

1. Testicular function decline:

Testicular seminiferous tubules undergo fibrotic changes with age, and the number of supporting cells decreases, leading to a decline in spermatogenic function. Research shows that the testicular volume of men over 40 years old shrinks by about 1% every year, the spermatogenesis cycle is prolonged, and the spermatogonial stem cell proliferation capacity is reduced. This type of physiological decline can be delayed by supplementing nutrients such as zinc and vitamin E.

2. Changes in hormone levels:

Male testosterone levels decrease by 1%-2% each year starting from the age of 30, and elevated follicle-stimulating hormone FSH inhibits spermatogenesis. At the same time, the proportion of free testosterone decreases and the sex hormone binding globulin SHBG increases, further affecting the spermatogenic microenvironment. Concomitant insulin resistance also interferes with hypothalamic-pituitary-gonadal axis function.

3. Impact of chronic diseases:

Chronic diseases such as diabetes and hypertension can damage testicular microvessels, leading to local ischemia and hypoxia. The sperm DNA fragmentation rate of diabetic patients can be up to three times that of ordinary people. Calcium antagonists in high blood pressure medications may affect sperm motility. Such patients need to control underlying diseases and adjust medications that affect reproductive function.

4. Bad living habits:

Long-term smoking will increase the level of reactive oxygen species in semen by 3-5 times, and alcohol directly inhibits the synthesis of testosterone in the testicles. Sitting for a long time causes the scrotal temperature to increase by 0.5-1°C. Sitting for 3 consecutive hours can affect spermatogenesis. It is recommended to do 30 minutes of aerobic exercise every day and avoid wearing tight underwear.

5. Environmental toxin exposure:

Environmental estrogens such as bisphenol A and phthalates can interfere with endocrine, and the heavy metal lead in car exhaust can accumulate in testicular tissue. After pesticide residues enter the human body through the food chain, they can reduce sperm concentration by more than 40%. People exposed to radiation or working at high temperatures need to strengthen their protection.

Middle-aged and elderly men need to establish a healthy lifestyle to maintain their fertility. Guaranteeing 7 hours of sleep a day can help secrete testosterone, and eating zinc-rich foods such as oysters and pumpkin seeds more than three times a week. Moderate exercise such as squatting and swimming can improve pelvic blood circulation and avoid continuous exposure to high temperatures above 40°C. It is recommended to conduct routine semen examination every year, and if there is any abnormality, go to the reproductive medicine department for evaluation in a timely manner.