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What is a Protein Blood Test for Pregnancy?

Published in Prenatal Screening 2 mins read

A protein blood test for pregnancy, as exemplified by the Alpha-fetoprotein (AFP) Test, is a screening tool used to measure specific protein levels in a pregnant person's blood. These tests help assess the baby's risk for certain genetic problems and birth defects.

Understanding the Alpha-fetoprotein (AFP) Test

The Alpha-fetoprotein (AFP) test is a key example of a protein blood test conducted during pregnancy. It is primarily utilized to measure the level of alpha-fetoprotein (AFP) in the blood of a pregnant individual. AFP is a protein naturally produced by the developing baby.

What Does the AFP Test Do?

The main purpose of an AFP test is to check the baby's risk for having certain genetic problems and birth defects. While it doesn't diagnose conditions, it helps identify pregnancies that may require further evaluation.

When Is the AFP Test Performed?

An AFP test is typically performed during the second trimester of pregnancy. Specifically, it is usually done between 15 and 20 weeks of pregnancy. This timing allows for adequate levels of AFP to be present for an accurate screening and provides time for follow-up tests if necessary.

Key Aspects of the AFP Test

To summarize the essential details about this protein blood test for pregnancy:

  • Type of Test: A blood test that measures the level of a specific protein, alpha-fetoprotein (AFP).
  • Target Protein: Alpha-fetoprotein (AFP), produced by the developing fetus.
  • Purpose: To screen and assess the baby's risk for genetic problems and birth defects.
  • Timing: Routinely conducted between 15 and 20 weeks of pregnancy.
  • Interpretation: High or low levels of AFP can indicate an increased risk, prompting further diagnostic testing.

This protein blood test serves as an important prenatal screening tool, providing valuable information about the baby's developmental health.