Normal Values:

• No defects in the chromosomes
• No excess of alpha fetoprotein or bilirubin

Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

What abnormal results mean:

Amniocentesis can be used to diagnose a large number of gene and chromosome problems in the baby. In addition, it can help diagnose the severity of:

• Lung maturity
• Neural tube defects (such as spina bifida)
• Rh incompatibility

DNA testing is available for many diseases. New diseases are being added to this list as genetic research advances. Ask your obstetrician or geneticist if you have a question about a specific disease.