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What is cordocentesis as a diagnostic test for Down syndrome in a pregnancy?

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Cordocentesis , also called “percutaneous umbilical blood sampling,” or PUBS, is done at 18 to 22 weeks. Your doctor uses a needle to take blood from the umbilical cord. This procedure has about a 1.4% to 1.9% chance of miscarriage, so it’s only done if the others don’t give clear results.

SOURCES:

Office on Women’s Health: “Prenatal Care Fact Sheet.”

Mayo Clinic: “Down Syndrome.”

National Down Syndrome Society: “Understanding a Diagnosis of Down Syndrome.”

March of Dimes: “Down Syndrome.”

KidsHealth: “Down Syndrome,” “Prenatal Genetic Counseling.”

National Institutes of Health, Eunice Kennedy Shriver National Institute of Child Health and Human Development: “How do health care providers test for Down syndrome?”

CDC: “Facts About Down Syndrome.”

Reviewed by Dan Brennan on May 5, 2019

SOURCES:

Office on Women’s Health: “Prenatal Care Fact Sheet.”

Mayo Clinic: “Down Syndrome.”

National Down Syndrome Society: “Understanding a Diagnosis of Down Syndrome.”

March of Dimes: “Down Syndrome.”

KidsHealth: “Down Syndrome,” “Prenatal Genetic Counseling.”

National Institutes of Health, Eunice Kennedy Shriver National Institute of Child Health and Human Development: “How do health care providers test for Down syndrome?”

CDC: “Facts About Down Syndrome.”

Reviewed by Dan Brennan on May 5, 2019

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What is genetic counseling for if you have a risk of having a baby with Down syndrome?

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