obesity in pregnancy

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Overweight or Obese? Don’t Count On Your Birth Control Pills.

Wednesday, July 14th, 2010

Since the pill first appeared on the scene, about 50 years ago, women have felt secure knowing that they had an almost foolproof way to avoid unwanted pregnancies. And that’s been mostly true.

But maybe not for all women.

If you’re overweight or obese, recent studies suggest that birth control pills might not be as effective for you as they are for more slender women:

“In one study of oral contraceptive pills, women with a body mass index (BMI) in the overweight range (a BMI of 25 or more) had a higher risk of pregnancy that those in the normal weight range. In another study of contraceptive skin patches, higher body weight — not higher BMI — was associated with higher risks of pregnancy.”

In addition to the sobering news about the lessened effectiveness of hormonal birth control, these birth control methods are thought to slightly increase a woman’s risks of heart disease, high blood pressure and other conditions. When you consider that overweight and obese women are already at increased risk of heart disease, diabetes and other ills, and that pregnancy is a riskier venture, overall, for obese women and their babies, you have a new incentive for getting your weight down.

I know it isn’t easy. I’ve struggled with weight myself and can attest to the fact that it’s a constant battle. But it’s a battle we must fight – and win. And now, we have one more reason to do it.

– Yvonne S. Thornton, MD, MPH

Ready to Deliver and Morbidly Obese: One of My Most Challenging Cases

Wednesday, June 23rd, 2010

A recent article in The New York Times talked about how the obesity epidemic is affecting pregnant women and their babies:

About one in five women are obese when they become pregnant, meaning they have a body mass index of at least 30, as would a 5-foot-5 woman weighing 180 pounds, according to researchers with the federal Centers for Disease Control and Prevention. And medical evidence suggests that obesity might be contributing to record-high rates of Caesarean sections and leading to more birth defects and deaths for mothers and babies.

New York City’s health department reported last Friday that half of the 161 women who died because of a problem with their pregnancy between 2001 and 2005 were obese. Black women were hit hardest, with a mortality rate seven times that of white women. While deaths are extremely rare in pregnancy, the city’s rate of 23.1 per every 100,000 births is twice the national average.

My new book, SOMETHING TO PROVE, is a personal memoir first, but because I’m a maternal-fetal medicine specialist and a surgeon, it also details a number of gripping moments in the operating room.

One of my most challenging cases involved a pregnant patient transferred to my care. When I walked into my new patient’s hospital room, I discovered she weighed more than 500 pounds and her baby was showing signs of distress on the fetal monitor.  The patient needed to be delivered. Let me give you a sense of the challenge with a brief excerpt:

…Many surgeons would begin their cut above her navel in an attempt to avoid that enormous layer of fat, while trying to find the uterus to get the baby out. …The area above the pubis, even in a morbidly obese woman, is usually flat and firm. Instead of a vertical incision from the navel down, I’d lift up the apron of fat and do a horizontal incision just above the pubis. That would allow me to get into the uterus and get the baby out. …We taped her massive belly to her chest, swabbed her with an antiseptic solution, and I went in. I was able to perform the cesarean quickly, without incident or excessive bleeding, and delivered the baby in only a few minutes.

The surgeon who handled the case recounted in The New York Times decided to cut through all the mother’s layers of fat, rather than using my technique of retracting and taping the massive layers of fat, which a colleague dubbed the “Thornton suspenders.” While there might have been excellent reasons for the physician’s decision, I hope more obstetricians learn to use the “Thornton suspenders” for such difficult deliveries in obese moms. Because, as the Times article explains:

… where every minute counted, it took four or five minutes, rather than the usual one or two, to pull out a 1-pound 11-ounce baby boy.

– Yvonne S. Thornton, MD, MPH