Abortion Rate Following Chorionic Villous Sampling and Amniocentesis in Twin Pregnancies

Area of Science:

• Perinatal Medicine
• Medical Genetics
• Obstetrics

Background:

• Amniocentesis and chorionic villus sampling (CVS) are standard prenatal diagnostic procedures.
• Complication rates, particularly in twin pregnancies, require further clarification.

Purpose of the Study:

• To determine the prevalence of post-procedure complications following amniocentesis or CVS in twin pregnancies.
• To assess adverse pregnancy outcomes associated with these invasive prenatal tests.

Main Methods:

• Retrospective observational study of 187 twin pregnancies undergoing amniocentesis or CVS.
• Data collected on vaginal bleeding, membrane rupture, chorioamnionitis, and abortion.
• Procedures performed by expert perinatologists.

Main Results:

• The overall abortion rate following amniocentesis or CVS in twin pregnancies was 3.7%.
• High-risk screening and abnormal ultrasound scans were primary indications for testing.
• Diagnostic test results were normal in 90.4% of cases.

Conclusions:

• The 3.7% miscarriage rate in twin pregnancies undergoing amniocentesis or CVS is low.
• Emphasizing the benefits of these diagnostic tests over their rare complications is crucial for parental reassurance.