Kay and her husband, Kirk, want to know if their twin sons have a rare genetic disorder that runs in Kay's family. They want to know as early as possible in the pregnancy so they can make decisions regarding the pregnancy. Which prenatal test should they request?

Question

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Chorionic villus sampling (CVS) can be performed between 10 and 13 weeks of pregnancy and involves taking a sample of the placenta to test for chromosomal abnormalities or genetic disorders. This test can provide results earlier than amniocentesis, which is typically performed between 15 and 20 weeks of pregnancy. Ultrasound and alpha-fetoprotein tests do not directly test for genetic disorders.

Kay and Her Husband, Kirk, Want to Know If Their