Loose underwear may be good for sperm production

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"Beyond providing additional evidence that underwear choices may impact fertility, our study provides evidence, for the first time, that a seemingly random lifestyle choice could have profound impacts on hormone production in men at both the level of the testis and the brain", Jorge Chavarro, senior author of the study and associate professor of nutrition and epidemiology, said in the statement.

The study was published August 8 in the journal Human Reproduction.

The men involved were aged between 18 and 56 who visited Massachusetts General Hospital between 2000 and 2017 as part of couples seeking fertility treatment.

There have been several studies of late that show that there is a steady decline in sperm counts. Well, if one is wondering how does the type of underwear affect sperm concentration then here is the answer.

The study, published in the journal Human Reproduction, also found that a hormone from the brain that tells the testicle to make sperm, called follicle stimulating hormone (FSH), was 14% lower in wearers of looser underwear. Options included boxers, jockeys, bikini, briefs, and other. Their sperm were 33 percent more motile. It was found that these men had 25% higher sperm concentration than the men who mostly wore tighter-fitting underwear and their total sperm count was 17% higher. The simultaneous presence of lower sperm counts and higher FSH among men wearing tight-fitting underwear suggests the presence of a compensatory mechanism. "Additionally, the differences in hormone and semen analysis parameters were not different enough to be identified as the primary cause of infertility".

Loose fitting boxers like these could increase your chance of having children, study says. This study adds to the scientific basis to that advice.

The abstract for the study concludes: "Men who reported most frequently wearing boxers had higher sperm concentration and total count, and lower FSH levels, compared to men who did not".

"Since men can modify the type of underwear they choose to wear, these results may be useful to improve men's testicular function", lead researcher, Dr Lidia Minguez-Alarcon, a research scientist at Harvard TH Chan School of Public Health in Boston, said.