China: Older men are more difficult to have children

The amount of healthy sperm in Chinese men began to decline when they turned 30, according to research by scientists at the Shanghai Institute of Birth Planning (China).

Fox News news agency reported that Dr. Qian-Xi Zhu and colleagues at Shanghai Biomedical Research Institute monitored changes in physical activity and sperm count in the semen of the herd. Mr. China. They found that sperm count and quality decreased when age increased.

The team analyzed sperm count and their motility in semen samples of about 1,000 men aged 20-60 years in China. They then compared these factors between men in different age groups.

Compared to men from 20 to 29 years old, men over the age of 35 have a healthy sperm count that is less fertile. Scientists also found that sperm's ability to function began to decrease when men turned 30 and decreased by 1% each year in subsequent years.

The percentage of sperm that survived in semen samples for older men was also lower than for younger men. Specifically, 73% of sperm in semen samples survived, while only 65% ​​of sperm survived in semen samples of men aged 50-60 years.

Research by Chinese scientists is consistent with previous observations by Dr. Andrew Wyrobek, a sperm specialist at Lawrence Berkeley National Laboratory in California (USA), about the semen changes of people men in California.

'The sperm's ability to move flexibly changes inversely with the age of adult men. The older they are, the harder it is for men to have children , 'said Dr. Andrew Wyrobek.