It used to be that infertility was considered a “female problem.” But over the past decade or so we’ve discovered that it’s a “female problem” about 40 percent of the time, a “male problem” 40 percent, and unexplained 20 percent.

When it comes to male infertility, we know that obesity, smoking, alcohol use, and hot tubs can lower sperm count and deform some of the ones that survive. But researchers just found out that a man’s diet can have a big effect too.

The short version of the story is that guys who eat a lot of saturated fats have lower sperm counts and sperm quality. Guys who eat lots of 0mega-3 fatty acids (often found in fish and flax) have the higher sperm counts and healthier little swimmers.

I guess the message here is that if you’re looking to get pregnant, next time you have a romantic candlelit dinner, make you order the fish.

More details on the study here: