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Study suggests women 35+ are at decreased risk to have anatomically abnormal child

2014-02-03
(Press-News.org) Contact information: Vicki Bendure
vicki@bendurepr.com
202-374-9259
Society for Maternal-Fetal Medicine
Study suggests women 35+ are at decreased risk to have anatomically abnormal child In a study to be presented on Feb. 6 at 3 p.m. CST, at the Society for Maternal-Fetal Medicine's annual meeting, The Pregnancy Meeting™, in New Orleans, researchers will report that women ages 35 and older are at a decreased risk of having a child with a major congenital malformation, after excluding chromosomal abnormalities.

Advanced maternal age, traditionally defined as 35 and older, is a well-established risk factor for having a child with a chromosomal abnormality, such as Down syndrome. However, little information is available regarding the association between advanced maternal age and the risk for having a child with a major congenital malformation—a physical defect present at birth that can involve different parts of the body, including but not limited to the heart, brain, kidney, bones or intestinal track.

In order to address this question, this retrospective study used obstetric and ultrasound information collected from over 76,000 women at the time they presented for their routine second trimester ultrasound at Washington University in St. Louis (Mo.). Researchers compared the incidence of having one or more major congenital malformations diagnosed at the time of ultrasound in women who were younger than 35 versus those women 35 years and older.

Also examined was the incidence of major malformations of women categorized by organ system including heart, brain and kidney. Overall, we found that advanced maternal age was associated with a 40 percent decreased risk of having a child with one or more major congenital malformations, after controlling for other risk factors. Specifically, the incidence of brain, kidney, and abdominal wall defects were decreased in this group of women, while the incidence of heart defects was unchanged.

"As more women are choosing to delay childbearing, they are faced with many increased pregnancy risks," said Katherine R. Goetzinger M.D., M.S.C.I., one of the study's researchers. "Findings from this study may provide some reassurance for these women regarding the likelihood of having an anatomically normal child."

Goetzinger, an assistant professor of maternal-fetal medicine at Washington University in St. Louis School of Medicine, also noted that it is possible that advanced maternal age conveys a "survival of the fittest" effect, in which anatomically normal fetuses are more likely to survive.

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A copy of the abstract is available at http://www.smfmnewsroom.org. For interviews please contact Vicki Bendure at Vicki@bendurepr.com 202-374-9259 (cell), or Meghan Blackburn at Meghan@bendurepr.com, 540-687-5099 (office) or 859-492-6303 (cell).

The Society for Maternal-Fetal Medicine (est. 1977) is the premiere membership organization for obstetricians/gynecologists who have additional formal education and training in maternal-fetal medicine. The society is devoted to reducing high-risk pregnancy complications by sharing expertise through continuing education to its 2,000 members on the latest pregnancy assessment and treatment methods. It also serves as an advocate for improving public policy, and expanding research funding and opportunities for maternal-fetal medicine. The group hosts an annual meeting in which groundbreaking new ideas and research in the area of maternal-fetal medicine are shared and discussed. For more information visit http://www.smfm.org.

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[Press-News.org] Study suggests women 35+ are at decreased risk to have anatomically abnormal child