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FREE BET HCG

About the test
What is this test done for?
Free Beta Human Chorionic Gonadotropin is a substance found in mother’s blood stream from the 1st trimester. This is a screening test for Down’s syndrome & Trisomy 18.
Why is it Done?

It is done:

  • To assess the chance for the baby having Down’s syndrome or trisomy 18. It is based on levels of this substance in the blood, depending on the age, weight & on the number of the months of pregnancy.
  • To aid in the diagnosis & monitoring of Trophoblastic disease.
When should it be performed?

It is performed:

  • In first & second trimester of pregnancy. (10-14 weeks)
  • In the patients who have previous history of abnormal baby with  choromosomal abnormalities.
How is it done
A blood sample will be collected from a vein in your arm. Fasting is not required prior to sample collection.
Results

Screening can be positive or negative.

  • Screening is positive if HCG levels are high. This means the patient’s chance of having a fetus with choromosomal condition is high. Follow up testing called amniocentesis needs to be done.
  • Screening is negative if HCG levels are low. This suggests that the patient’s chance of a normal fetus are high. No follow up testing is required.
Other Tests
Ultrasound screening should be done each month to assess growth of baby.
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