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Member Research & Reports

Member Research & Reports

BU: Too Much, Too Little Sleep Hurts Men’s Ability to Get Partners Pregnant

Men who sleep too little or too much were the least likely to conceive with their partners, according to a new study by Boston University School of Public Health (BUSPH) researchers.

The study, presented at the American Society for Reproductive Medicine’s Scientific Congress in October and scheduled for publication in the coming months, found that men who slept, on average, fewer than six hours per night, or nine hours or more, had the most trouble getting their partners pregnant. The average per-cycle probability of pregnancy for men with short or long sleep duration was 42 to 43 percent lower than those who slept eight hours per night.

Also, compared to men who had no problems sleeping, those who reported such problems “slightly more than half of the time, most of the time, or all of the time,” as measured by the Major Depression Inventory, were 28 percent less likely to conceive with their partners in any given cycle.

Dr. Lauren Wise, professor of epidemiology at BUSPH and the study’s lead researcher, said that while sleep problems have been associated with decreased testosterone levels and poor semen quality, this is the first prospective study to examine how the duration and quality of sleep affect male fecundability.

To read more about the study, go to: