1. Amniocentesis is a procedure to determine whether a fetus is healthy.2. One recent study suggests many women might be undergoing amniocentesis unnecessarily. 3. An amniocentesis later proves that the baby is Sonny's. 4. An amniocentesis confirmed she was carrying a healthy fetus, a boy. 5. Larson had planned to perform an amniocentesis on April 24, 1990. 6. But roughly one woman in every 200 to 300 miscarries after amniocentesis . 7. Amniocentesis itself carries a small risk of causing a miscarriage.8. The information is then used to decide whether to proceed with amniocentesis . 9. Prenatal diagnosis is possible via amniocentesis or chorionic villus sampling. 10. Prenatal diagnosis is possible using amniocentesis or chorionic villus sampling.