What are the components of the triple screen conducted during pregnancy?

The triple screen, a prenatal test typically performed during the second trimester of pregnancy, assesses the levels of three key substances in the mother's blood. These substances are vital for evaluating the risk of certain fetal conditions, such as Down syndrome and neural tube defects.

The correct components of the triple screen include beta-human chorionic gonadotropin (beta HCG), alpha-fetoprotein, and unconjugated estriol. Each of these components serves a specific purpose:

• Beta HCG is a hormone typically produced by the placenta shortly after implantation. Elevated or low levels can indicate potential issues with the pregnancy.

• Alpha-fetoprotein is a protein produced by the fetus, and abnormal levels can suggest the risk of neural tube defects or chromosomal abnormalities.

• Unconjugated estriol is an estrogen produced by the fetal liver and placenta; its levels can provide insights into the wellbeing of both the fetus and the placenta.

These components collectively offer a more complete picture of fetal health and help guide further testing or intervention if necessary. The inclusion of these specific substances makes the triple screen a valuable tool in prenatal care.