Healthy weight may protect male fertility study

Male infertility is becoming a growing health concern around the world and new research suggests that excess body fat may be one of the reasons behind the rising number of cases.

A study from Aarhus University found that higher levels of body fat can negatively affect male reproductive health and reduce fertility.

The researchers followed 1,058 young men, who were about 18 years and 9 months old when the study began.

They measured body fat body weight and muscle mass to understand how body composition affects fertility. According to the researchers a healthy body fat percentage for men is generally between 8% and 19%, while 20% or higher is considered elevated.

The study found that men with higher body fat had on average a 23% lower sperm count than those with healthier body fat levels.

The researchers also found that excess body fat may disrupt hormones that play an important role in sperm production and overall reproductive health.

Hormonal changes caused by obesity can reduce both sperm  quality and fertility.

Experts say maintaining a healthy weight through regular exercise a balanced diet enough sleep and stress management can support both overall health and reproductive health.

Avoiding smoking limiting alcohol and managing long term medical conditions may also help improve fertility.

The findings were published in the journal Human Reproduction.

The study supports earlier findings from the World Health Organization, which reported in 2023 that about 17.5% of adults worldwide experience infertility at some point in their lives.

The WHO also noted that infertility affects people in high middle and low income countries making it a global public health challenge.

Researchers say that while infertility can have many causes keeping body fat at a healthy level may be an important step in protecting male fertility and improving reproductive health.