How often should prenatal visits typically occur in the second trimester?

During the second trimester of pregnancy, prenatal visits usually occur once a month. This frequency allows healthcare providers to monitor the progress of the pregnancy, check the mother's health, and conduct necessary tests or screenings.

As the pregnancy progresses, these visits are important for assessing fetal growth and development, measuring changes in the mother's body, and discussing any concerns she may have. The schedule also aligns with the typical growth patterns and developmental milestones that are expected during this trimester, making it a standard practice in prenatal care.

The other options represent different schedules that are either too frequent or too infrequent for the second trimester. Visits every two weeks might be appropriate during the third trimester when more intensive monitoring is needed as the due date approaches. Weekly visits would not be necessary unless there are complications or specific health concerns. Quarterly visits are insufficient during this stage, as they fail to provide adequate monitoring of maternal and fetal health.