Obese women gain too much weight in pregnancy, then retain weight a year later

Oct 21, 2009

Obese women who gain more than the recommended amount during pregnancy are much more likely to retain a portion of that weight one year after they give birth, according to a Kaiser Permanente study published in the November issue of Obstetrics & Gynecology.

This is the largest U.S. study to examine the relationship between excessive during and retention specifically in who are obese. Funded by the Centers for Disease Control and Prevention, the study of 1,656 obese women found that most of them gained too much weight during pregnancy, then, on average, kept on 40 percent of the weight one year after they gave birth.

"We found that nearly three quarters of obese women gain too much weight during pregnancy—and the more weight they gain, the harder it is to lose," said study lead author Kim Vesco, MD, MPH, a practicing OB/GYN and an investigator at the Kaiser Permanente Center for Health Research. "This extra weight also increases the risk of pregnancy and delivery complications like diabetes, preeclampsia, bigger babies, C-sections, and birthing injuries." Vesco is also leading a new study to help obese women maintain their weight during pregnancy.

This study defined excess weight as more than 15 pounds, which until recently was the minimum amount of weight gain recommended for obese pregnant women by the Institute of Medicine. In May of 2009, the IOM set an upper limit for weight gain in obese pregnant women, suggesting they gain between 11-20 pounds.

This study found that, on average, women retained 40 percent of the weight they gained during pregnancy one year after delivery. So if a woman gained 15 pounds during pregnancy, she could be expected to retain 6 of those pounds at one year; if she gained 30 pounds, she would retain 12 pounds.

The study included 1,656 Oregon and Washington women enrolled in the Kaiser Permanente health plan whose body mass index was 30 or higher at the start of their pregnancies, and who gave birth between January 2000 and December 2005. To be included in the study, women had to have three key weight measurements recorded in their medical records: a starting weight between six months prior to conception and 12 weeks after conception; a delivery weight within two weeks after giving birth; and a follow-up weight 8󈝾 months after delivery.

The study looked at pregnancy weight gain and weight retained one year after delivery. Compared to women who gained less than the recommended 15 pounds, women who gained 15󈞅 pounds were twice as likely to retain 10 excess pounds; women who gained more than 35 pounds were nearly eight times more likely to retain at least 10 pounds. The study also found that younger women and first-time mothers were most likely to gain too much weight.

"We need to do a better job of helping control weight gain during their pregnancies. Once the baby is born, it's much harder to change eating habits and start an exercise program," said Victor Stevens, Ph.D., co-author and senior investigator at the Kaiser Permanente Center for Health Research. "If we can prevent the weight gain in the first place, moms and babies will be healthier in the long run."

Source: Kaiser Permanente (news : web)

Explore further: Extreme weather kills 2,000 in U.S. each year: CDC

add to favorites email to friend print save as pdf

Related Stories

When it's not just baby weight

Dec 22, 2008

Body image is a tricky thing for many women. Like looking into a funhouse mirror, the way they perceive their bodies can make them think they're thinner or more obese than they actually are. Researchers led by Temple University's ...

Study suggests obese women should not gain weight

May 29, 2009

For years, doctors and other health-care providers have managed pregnant patients according to guidelines issued by the American College of Obstetricians and Gynecologists (ACOG). In 1986, ACOG stated, "Regardless of how ...

Many women add too many pounds during pregnancy

May 28, 2009

(AP) -- Eating for two? New guidelines are setting how much weight women should gain during pregnancy - surprisingly little if they're already overweight or obese when they conceive.

Recommended for you

User comments : 0