Study Says Not Getting Enough Sleep Greatly Reduces Male Fertility


A new study has found that getting less than six hours' sleep can nearly halve a man's chance of getting a woman pregnant. Yet getting too much sleep is almost just as bad, researchers say.

The study, conducted at Boston University, involved 695 couples and found that less than six hours' sleep per night reduces a man's fertility by up to 43 percent and getting more than nine hours reduces fertility by up to 42 percent.

The study included men aged 21 or older and women aged 21 to 45 who were undergoing in vitro fertilization treatment (IVF). The researchers assessed sleep patterns of the men for up to 12 months until the couple got pregnant. The study coincides with other studies which have shown that sleep quality affects sperm concentrations and testosterone levels in men.

The majority of daily testosterone release happens during sleep.

This fact could be a big part of why sleep issues can affect fertility in men. When the findings of the study were presented at the annual congress of the American Society for Reproductive Medicine, questions about whether sleep were the only factor were raised. The study's authors admit that this is a legitimate question, but postulate that sleep quality can be a definite factor in fertility.

The researchers admit that more study is required to fully understand sleep's effects on sperm and fertility.



The information provided on is designed to support, not replace, the relationship that exists between a patient/site visitor and his/her health professional. This information is solely for informational and educational purposes. The publication of this information does not constitute the practice of medicine, and this information does not replace the advice of your physician or other health care provider. Neither the owners or employees of nor the author(s) of site content take responsibility for any possible consequences from any treatment, procedure, exercise, dietary modification, action or application of medication which results from reading this site. Always speak with your primary health care provider before engaging in any form of self treatment. See our Legal Statement for more details.

Fertility Clinics Directory

Find a Fertility Clinic

If you or a loved one is suffering from infertility and needs help conceiving then we are here to offer help in any way we can. We have over 450 Fertility Clinics listed on our Directory. Click here to search for a Fertility Clinic that is right for you.