According to standard prenatal care guidelines, how often should a doctor appointment be scheduled until week 28?

During the first 28 weeks of pregnancy, standard prenatal care guidelines recommend scheduling doctor appointments once a month. This frequency allows healthcare providers to monitor the mother's and baby's health, perform necessary screenings, and address any concerns or questions the expectant mother may have. Regular monthly visits provide a structured approach to ensure that both maternal and fetal well-being is tracked appropriately, enabling timely interventions if necessary.

The reason for other options not being correct lies in the fact that more frequent visits are generally not necessary during this period, as the majority of changes and developments occur at a slower pace than in later stages of pregnancy. After the 28-week mark, visits typically increase in frequency to accommodate the heightened monitoring needs toward the end of the pregnancy.