02/19/2013 03:18 pm ET Updated Feb 19, 2013

DNA Test For Rare Disorders Becomes More Routine

Debra Sukin and her husband were determined to take no chances with her second pregnancy. Their first child, Jacob, who had a serious genetic disorder, did not babble when he was a year old and had severe developmental delays. So the second time around, Ms. Sukin had what was then the most advanced prenatal testing.

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