Which test is often performed to assess for fetal well-being in late pregnancy?

The biophysical profile is a comprehensive test that assesses fetal well-being, especially in the late stages of pregnancy. This assessment combines the evaluation of the fetal heart rate patterns, fetal movements, fetal tone, and the amount of amniotic fluid present. It helps to identify potential issues such as fetal distress, which may necessitate further monitoring or intervention. By integrating these factors, the biophysical profile provides a clear picture of the fetus's health, allowing healthcare providers to make informed decisions regarding labor and delivery.

Other tests listed serve different purposes. For example, the glucose tolerance test is primarily used to assess the mother for gestational diabetes. Chorionic villus sampling is a procedure used for genetic testing in the first trimester, while amniocentesis is primarily performed to diagnose genetic conditions and assess lung maturity. These tests do not provide comprehensive information on fetal well-being during late pregnancy as effectively as the biophysical profile does.