Which of the following tests is NOT typically performed during the initial prenatal visit?

The correct choice is the prolactin level, as it is not a routine test during the initial prenatal visit. During the initial prenatal visit, healthcare providers typically focus on essential assessments that help evaluate the mother’s overall health and the pregnancy's viability.

Blood pressure is routinely measured to establish a baseline and monitor for any potential complications like hypertension, which poses risks during pregnancy. A complete blood count (CBC) is also standard to assess for anemia, infection, and overall health. A urinalysis (UA) with glucose is performed to screen for urinary tract infections and monitor for conditions like gestational diabetes through glucose levels.

In contrast, measuring prolactin levels is not a standard part of the initial prenatal assessment. Prolactin is primarily associated with lactation and may be checked in specific circumstances, such as investigating disorders related to abnormal lactation or pituitary function, but it does not have routine relevance in the early evaluation of a healthy pregnancy.