Amniocentesis
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Amniocentesis:
Amniocentesis is an invasive diagnostic test for chromosomal and genetic abnormalities, typically performed between 15 and 17 weeks of pregnancy. A thin needle is used to collect amniotic fluid from the uterus under ultrasound guidance, with a risk of pregnancy loss of less than 0.5%. No special preparation is needed, but discuss any blood thinners with your doctor. Post-procedure, expect mild discomfort or minor bleeding; seek medical attention for severe symptoms like high fever or excessive bleeding. After the test, moderate activity is recommended, and if any symptoms like abdominal tenderness, vaginal bleeding, or fluid leakage occur, contact your healthcare provider. The fluid is analyzed for genetic issues, with results categorized as normal, abnormal, or uncertain. Normal results indicate no detectable genetic problems, abnormal results suggest potential issues requiring follow-up, and uncertain results may need further evaluation.
When is Amniocentesis Performed?
Typically after 15 weeks of pregnancy: This allows for the development of sufficient amniotic fluid.
In specific cases: May be performed earlier if there are other risk factors or concerns.
How is Amniocentesis Done?
Ultrasound Guidance: The doctor uses ultrasound to visualize the fetus and locate the placenta.
Needle Insertion: A thin needle is inserted through the woman’s abdomen into the amniotic sac.
Fluid Withdrawal: A small amount of amniotic fluid is carefully withdrawn.
What Information Does Amniocentesis Provide?
Chromosomal Abnormalities: Can detect conditions like Down syndrome, trisomy 18, and trisomy 13.
Genetic Disorders: Can identify certain genetic diseases, such as cystic fibrosis and sickle cell anemia.
Risks Associated with Amniocentesis
Miscarriage: There is a small risk of miscarriage following amniocentesis, typically less than 1%.
Infection: There is a very low risk of infection.
Leaking Amniotic Fluid: In rare cases, amniotic fluid may leak after the procedure.
Important Note: Amniocentesis is typically recommended for women at high risk of having a child with a genetic or chromosomal abnormality. It’s essential to discuss the potential risks and benefits with your healthcare provider before making a decision.
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