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    14 Facts About Male Infertility That’ll Make You Go, “Wait, What?”

    It's not as simple as you think.

    Dr. Marianne J. Legato — Gender Medicine Expert and UpSpring Medical Advisor — recently shared with BuzzFeed Parents some surprising facts about male infertility you probably did not know:

    1. Retrograde ejaculation — where semen goes into the bladder instead of out of the penis — is a very real thing.

    2. A loss of smell can be a sign of infertility.

    3. Overweight men tend to have lower testosterone levels, poor sperm quality, and reduced fertility.

    4. Depression or emotional stress can impair a man's fertility.

    5. Men who chew betel nuts — which are popular in Taiwan and other parts of Asia — tend to have offspring with a significant number of developmental disabilities.

    6. A loss of facial or body hair can also be a sign of conditions that impair fertility.

    7. Love to spend a long time in the hot tub? It can impair fertility because overheating the scrotum inhibits sperm production and quality.

    8. Your fertility can be affected by the lifestyle of your grandparents.

    9. You probably had an idea that smoking wasn't great for fertility. But did you know that even second-hand smoke exposure can reduce fertility? It's true.

    10. Making sure you get enough Vitamin E can increase fertility.

    11. The most common reversible cause of infertility? A varicocele, which is a swelling of veins that supply the testis. It can be surgically treated.

    12. Having athlete’s foot could potentially impair your fertility. That's because antifungal drugs can be associated with lower production of sperm.

    13. Some factors that impair fertility only impact the offspring of one sex. For example, men who smoked at a very early age (like before age 11) see adverse affects in their sons, but not their daughters.

    14. Normally, antibodies fight things like bacteria and viruses, but there are some antibodies that actually attack sperm.