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Amniotic Fluid Analysis

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Also known as: Amniocentesis; Amnio; Culture - amniotic fluid; Culture - amniotic cells; Fetal Lung Maturity Tests
Formal name: Amniotic Fluid Analysis

At a Glance

Why Get Tested?

To detect and diagnose certain birth defects, genetic diseases, and chromosomal abnormalities in a fetus, especially if maternal serum screening tests are abnormal; to evaluate fetal lung maturity when there is an increased risk of premature delivery; sometimes to diagnose a fetal infection; occasionally to help diagnose and monitor hemolytic disease in a fetus

When to Get Tested?

Between 15 and 20 weeks of gestation to test for genetic diseases, chromosomal abnormalities, and open neural tube defects; after 32 weeks to evaluate fetal lung maturity; when it is suspected that a fetus has an infection or other illness; serially, about every 14 days, when it is suspected that a pregnant woman has an Rh or other blood type incompatibility with her fetus

Sample Required?

A sample of amniotic fluid obtained using a procedure called amniocentesis

Test Preparation Needed?

You may be instructed to have either a full or empty bladder prior to amniocentesis, depending on when during your pregnancy the testing is being performed; follow any instructions you are given.