Britannica Sources used in this answer

Which genetic conditions and birth defects can amniocentesis screen for?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Close-up of a home pregnancy test device showing a blue plus sign in the result window, indicating a positive result for pregnancy. — pregnancy Devices for individual use at home detect pregnancy by measuring levels of the hormone human chorionic gonadotropin (hCG) in urine.

Amniocentesis is a diagnostic procedure used to analyze amniotic fluid and fetal cells to identify various health conditions in a developing fetus.12

While it is most frequently utilized to detect chromosomal anomalies and neural tube defects, the procedure can screen for a wide range of conditions, including:13

Chromosomal Abnormalities: Such as Down syndrome.3
Genetic and Metabolic Diseases: More than 50 metabolic diseases can be diagnosed, including autosomal recessive conditions like Tay-Sachs disease and cystic fibrosis.13
Sex-Linked Conditions: By determining the sex of the fetus, the procedure helps identify risks for sex-linked inherited diseases.13
Neural Tube Defects: Including spinal cord defects.3

It is important to note that not all birth defects can be detected through this method. Because amniocentesis is an invasive procedure, it carries an increased risk of miscarriage, and parents are often encouraged to consult with a genetic counselor to interpret results and navigate the complex decisions that may follow.32