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After 21 weeks, Amniocentesis still 'fairly safe'. (Rate of Nonlethal Complications was 3%).
NEW YORK -- Amniocenteses performed after 21 weeks' gestation caused nonlethal complications in 3% of 365 procedures, but other invasive prenatal procedures done after 21 weeks were riskier, Dr. Alain Gagnon reported.
The findings came from a retrospective review of 375 charts for pregnant women who underwent 512 prenatal invasive diagnostic or therapeutic procedures after 21 weeks' gestation over a 4-year period. Amniocentesis this late in pregnancy "appears to be fairly safe, with a rate of complications very similar to what is reported for midtrimester amniocentesis: around 1 in 166," he said at the 12th World Congress on Ultrasound in obstetrics and Gynecology.
Before conducting this study, Dr. Gagnon of the University of British Columbia, Vancouver, and his associates found only one published study of prenatal invasive procedures performed after 20 weeks. That study showed a slight decrease in complications with cordocentesis performed after 22 weeks' gestation rather than earlier.
In the current study, 10 fetuses (3%) in the amniocentesis group died in ...
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Source: HighBeam Research, After 21 weeks, Amniocentesis still 'fairly safe'. (Rate of Nonlethal...