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Fall 2007

When You're Pregnant and Have Diabetes

Good blood sugar control makes all the difference for your baby’s health

Pregnancy is all about planning—everything from childbirth classes to the new baby’s name. But if you have diabetes, planning is extra-critical. “Women with diabetes are at higher risk for miscarriage and birth defects,” says perinatologist (high-risk childbirth spe-cialist) William Roberts, M.D., of Lehigh Valley Hospital and Health Network. “It is important that they get their blood glucose under control at least three months before conception.”

During pregnancy, blood sugar and ketones (produced when the body breaks down fat) pass through the placenta to the baby. In large amounts, they can cause heart defects, spina bifida, deafness and missing extremities, especially during the first few weeks of organ growth. Six to 12 percent of babies born to diabetic mothers have birth defects, Roberts says, versus 2 to 3 percent for non-diabetic mothers.

Some women who’ve never had diabetes develop high blood sugar during pregnancy. This is known as gestational diabetes, and it affects about 4 percent of pregnant women in the United States each year. You’re at higher risk if you have a history of diabetes in your family. With our society’s rising rates of diabetes and obesity, gestational diabetes also is on the rise, says endocrinologist Larry Merkle, M.D., of Lehigh Valley Hospital and Health Network.

Because gestational diabetes occurs late in pregnancy (usually the last trimester), it doesn’t cause the birth defects mentioned earlier. But high blood sugar in the mother means high blood sugar in the baby. If it’s too high, the baby turns the extra calories into fat—and an overweight baby can mean a difficult labor or, in some cases, a Cesarean section.

To detect gestational diabetes, all women are screened at about 28 weeks of preg-nancy. (Those with a family history of diabetes are screened at 10 to 12 weeks.) “Gestational diabetes is a wake-up call to mothers,” says diabetes nurse educator Maryellen Cooper, R.N., of Lehigh Valley Hospital and Health Network. Half the women who have gestational diabetes eventually develop type 2 diabetes, she says, and overweight newborns also are at greater risk for the disorder later in life.

“Keeping your blood sugar under control is key to keeping yourself and your child healthy,” says Roberts’ colleague, certified nurse practitioner Wendy Prutsman, R.N. That means regular exercise, a carefully followed diet, and insulin if you need it. For those with pre-existing diabetes, an insulin pump may offer the best control. For gestational diabetes, insulin is used most often, though oral medications also are available. Since some of these cross the placenta, people tend to avoid them, Roberts says, but there is no evidence they can harm the baby.

After the birth, gestational diabetes goes away in 98 percent of cases. But it’s important, Roberts says, for diabetic women to continue controlling their blood sugar—and following a healthy diet and exercise routine to reduce their risk for problems in the future.

Want to Know More about breastfeeding for diabetic mothers, staying healthy after pregnancy, and how to help children avoid diabetes and obesity? Call 610-402-CARE.

This page last updated 2/12/08 04:08 PM
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Lehigh Valley Hospital has campuses in Allentown and Bethlehem, Pa. and serves the Pennsylvania communities of Easton, Doylestown, Hazelton, Lehighton, Perkasie, Pottstown, Pottsville, Reading, Scranton, Wilkes Barre, Stroudsburg, and the Poconos and also Phillipsburg and Flemington, N.J., and western New Jersey.

 
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