Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Infertility & Reproduction Health Center

Font Size

Obese Couples Risk Lower Fertility

Study Shows Weight of Both Partners May Affect Conception

Weight Loss Reduced Time to Conception continued...

Obese women had a 78% greater risk of being sub-fertile than normal-weight women, and obese men had a 49% increased risk for sub-fertility than normal-weight men.

The risk of taking more than a year to achieve a pregnancy was 2.74 times higher when both partners were obese than for a normal-weight couple.

The researchers further examined 2,374 couples who had more than one pregnancy. When they converted the length of time that it took the women to get pregnant into days, they concluded that for overweight or obese women, every 2.2 pounds of weight loss reduced the time to conception by an average of 5.5 days.

Heavier Men Have Less Sex

The suggestion that weight loss seems to improve fertility for both women and, to a lesser extent, men has important potential public health implications, says epidemiologist Donna Baird, PhD, of the National Institute of Environmental Health Sciences (NIEHS).

Baird co-authored a 2006 NIEHS study that linked obesity to infertility in men. The researchers concluded that a 3-unit increase in BMI increased the risk of infertility by about 10%.

At least one other study has linked obesity in men to a decline in sperm quality, but Baird says more research is needed to confirm the association between body weight and infertility in men.

She adds that the decline in fertility among overweight and obese men may have more to do with sexual function than sperm quality.

“There are a lot of gaps in what we know,” she tells WebMD. “We didn’t have data on the frequency of sexual intercourse among men, and we know that obesity can certainly impact sexual function. Low libido and erectile dysfunction, for example, are much more common in obese men.”

1 | 2

Today on WebMD

Four pregnant women standing in a row
How much do you know about conception?
Couple with surrogate mother
Which one is right for you?
couple lying in grass holding hands
Why Dad's health matters.
couple viewing positive pregnancy test
6 ways to improve your chances.
Which Treatment Is Right For You
Conception Myths
eddleman prepare your body pregnancy
Charting Your Fertility Cycle
Fertility Specialist
Understanding Fertility Symptoms
invitro fertilization