Everything You Need to Know About Amniocentesis
Dr. Claude Allouche, Gynecologist, Ahuza Clinic, Raanana, 058 726 02 64
What is Amniocentesis?
Definition: Amniocentesis is an invasive prenatal test aimed at collecting a sample of amniotic fluid that surrounds the fetus in the uterus.
Procedure: A sample is taken using a fine needle inserted into the abdomen of the pregnant woman. The sample is then analyzed to detect chromosomal abnormalities, such as trisomy 21.
When is Amniocentesis Recommended?
Indications: This test is recommended for women at high risk of chromosomal abnormalities:
- Women over 35 years old.
- Family history of genetic diseases.
- Abnormal results from previous prenatal tests.
Practice in Some Countries: In some countries, such as Israel, the threshold age has been lowered to 33 years for systematic and free amniocentesis management.
How is Amniocentesis Performed?
Timing: Typically performed between 16 and 20 weeks of pregnancy.
Preparation: An ultrasound is performed before the test to locate the fetus and assess the amount of amniotic fluid.
Procedure: A fine needle is inserted into the abdomen to collect the sample. The procedure lasts about 30 to 45 minutes.
Risks Associated with Amniocentesis:
- Miscarriage: Approximately 1 in 200 to 1 in 400.
- Other risks: Infection, bleeding, leakage of amniotic fluid, allergic reaction to the needle or local anesthesia.
What to Do After Amniocentesis?
Rest: It is advisable to rest for about 24 hours after the test.
Results: The results are generally available after two weeks and will be discussed during a follow-up appointment with the doctor.
Conclusion:
Amniocentesis is a common and generally safe prenatal test that allows for the detection of chromosomal abnormalities in the fetus. Although it carries some risks, it can help pregnant women make informed decisions regarding their pregnancy. For any further questions, consult your doctor.
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