Health 101: Infertility in Men

Does wearing tight underwear or using hot tubs impact fertility in men?

Because extremely warm temperatures can decrease sperm count, it's been speculated that wearing briefs instead of boxers, using hot tubs, or even keeping a laptop computer on your lap too long can decrease fertility, though there's not a lot of good evidence of this, says Christopher Williams, MD, a reproductive endocrinologist in private practice in Charlottesville, Virginia and author of The Fastest Way to Get Pregnant Naturally.

"Study results are mixed at best, and if there is any effect, it's likely just temporary," he says. Certainly, there's no harm in your guy sticking to boxers or avoiding hot tubs while you try to conceive, but don't expect it to speed up your pregnancy timeline significantly either.

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