The findings may also not apply to the general population, since the study looked specifically at men seeking fertility treatment. A professor of Andrology from the University of Sheffield, Prof. Scientists noted that sperm production was known to be sensitive to temperatures above 34 degrees Centigrade, which explained why the testicles hang down away from the body. Those who favoured boxer shorts had on average The study does not prove that tight underwear causes sperm counts to fall. The study was based on data from men who were part of couples seeking infertility treatment at Massachusetts General Hospital between and A "man's sperm counts can vary tremendously week to week," said Dr.
Some styles of underpants bring the scrotum nearer to the body, thereby causing the testicles to warm up, while others, such as boxer shorts, are loose and cooler.
Wearing boxer shorts boosts sperm count, scientists say
They took into account other factors that can affect sperm, including age, body mass index and habits, such as smoking and use of hot tub, and speculated that the higher heat inside the pants was the root of the problem. A new study provides more evidence that when it comes to underwear, looser may be better for guys trying to conceive. Allan Pacey, a professor of andrology at Sheffield University, has published two large studies on the factors that affect sperm quality and found similar links to tight underwear. But even if a study finds that something is linked with lower sperm counts, "does that actually translate to a lower ability to cause a pregnancy? Scientists now know that the best conditions for sperm production occur in free-dangling testes that are 3 to 4C cooler than the normal body temperature of 37C. CD3DC0 Share your story with us: The first two traits would likely have a positive effect on fertility, the authors note, since sperm quality decreases with age and excess weight.