For the study, 501 couples who were trying to conceive logged their daily seafood intake—including fish and shellfish—in a journal for four years. They also tracked how often they had sex. The researchers followed the pairs for a year or until they became pregnant.
They found that men and women who consumed more than two servings of seafood per week while trying to get pregnant had more sex than those who consumed less seafood. They also got pregnant faster, even when the researchers adjusted for the rates of sexual activity.
In fact, 92 percent of the couples who enjoyed fish and shellfish more than twice a week were pregnant by the end of one year. Men and women with the highest seafood intake—more than eight servings per month—had a 22 percent higher rate of getting it on, too.
But was the fish making them feel frisky? Well, the study authors aren’t entirely sure. You may have heard that shellfish and oysters could potentially amp up your libido due to their high zinc content (despite scientific evidence confirming this is true), but because the researchers didn’t measure zinc in this study, they couldn’t really trace it back to that link, explains study author Audrey Gaskins, ScD, a research associate in the department of nutrition at Harvard T.H. Chan School of Public Health.
“It is also possible that couples who consume higher amounts of seafood together share more meals, and thus more time together (including nights),” she adds.
As for the rise in baby rates? The omega-3 fatty acids in fish could improve semen and embryo quality, up the likelihood of ovulation, and boost levels of progesterone (a sex hormone involved in pregnancy), Gaskins explains.
That’s a big deal since women often feel the need to avoid fish before and during pregnancy, due to concerns surrounding mercury levels, she adds. However, pregnant women should actually be eating more fish, since omega-3s are essential to prenatal development.
And obviously, having more sex—whether you want to have a kid or not—is a great thing. Not only does it help you feel more connected to your partner, but research also shows that sex is good for your heart, improves your cancer risk, and can help you de-stress (you probably already knew that last part).
Bottom line: Your body and your fertility may benefit when you eat more seafood.
This article originally appeared in Prevention