Which of the following assessments is essential for a primigravida during her second trimester?

The assessment of fetal heart rate is especially crucial during the second trimester for a primigravida, as it provides vital information about the health and well-being of the fetus. Monitoring the fetal heart rate allows healthcare providers to assess fetal development and detect any potential complications early on. A normal fetal heart rate indicates that the infant is receiving adequate oxygen and is not under stress, while abnormalities might prompt further investigation or intervention.

In the second trimester, the focus is on ensuring the fetus is growing appropriately and that there are no signs of distress. While blood glucose levels and monitoring of weight gain are important, they tend to be more critical in later stages or in specific high-risk scenarios. Observation of cervical dilation is more relevant in the later stages of pregnancy as it assesses impending labor, which is not a concern in the second trimester. Thus, monitoring fetal heart rate stands out as a key assessment in this period of pregnancy.