By Ryan Flinn - Wed Mar 14 00:01:00 GMT 2012

Mike Peres RBP SPAS Custom Medical Stock/Newscom

Human sperm under microscope.

Human sperm under microscope. Photographer: Mike Peres RBP SPAS Custom Medical Stock/Newscom

Men who eat fatty foods may be harming their chances for fatherhood, researchers say.

Sperm samples from almost 100 men on a range of diets showed those with the highest total of saturated fat intake had lower semen counts and concentrations, according to the study published today by the journal Human Reproduction. Men who ate more omega-3 fatty acids, found in some fish and flax, had a larger amount of normal-shaped sperm, scientists said.

Infertility affects about 15 percent of couples, with mens health linked to the issue 40 percent to 60 percent of the time, researchers said. While an earlier study showed an association between obesity and fewer healthier sperm, todays analysis looked at types of fats consumed among overweight individuals, said Jill Attaman, lead author.

This is the first study to demonstrate such an association, Attaman, an assistant professor of obstetrics and gynecology at Dartmouth Medical School in Hanover, New Hampshire, said in an interview.

The study examined sperm samples and food surveys from 99 men, 71 percent of whom were obese or overweight, taken from 2006 to 2010 at Massachusetts General Hospital Fertility Center in Boston. Participants were asked how often in the past year they ate specific foods. Men in the top third of fat consumption had 43 percent fewer sperm and 38 percent lower sperm concentration than those in the lowest fat intake group.

A reduced sperm count and concentration can decrease the odds of fertilizing an egg, according to the Mayo Clinic. Having normal-shaped sperm, or morphology, is also important.

Continued here:
Sperm Goes Limp With Fatty Foods While Fish Perks Them Up