**Core Concept**
The target for fasting blood sugar (FBS) and HbA1c in gestational diabetic patients is crucial to prevent both maternal and fetal complications. The American College of Obstetricians and Gynecologists (ACOG) and the American Diabetes Association (ADA) have established guidelines for managing gestational diabetes mellitus (GDM). The targets aim to balance the risk of hypoglycemia with the benefits of tight glucose control.

**Why the Correct Answer is Right**
The recommended target for FBS in GDM patients is 95 mg/dl or less, while for HbA1c, it is <6.5% or <6.0% in some guidelines. This is because tight glucose control has been shown to reduce the incidence of fetal macrosomia, preeclampsia, and other maternal and fetal complications associated with GDM. The ADA and ACOG recommend individualized targets based on the patient's health status, gestational age, and fetal well-being. **Why Each Wrong Option is Incorrect** **Option A:** 120 mg/dl - This value is higher than the recommended target and may increase the risk of maternal and fetal complications. **Option B:** 7.0% - This HbA1c value is higher than the recommended target and may indicate inadequate glucose control. **Option C:** 80 mg/dl - This FBS value is lower than the recommended target and may increase the risk of hypoglycemia. **Clinical Pearl / High-Yield Fact** In managing GDM, it is essential to individualize the targets based on the patient's health status and gestational age. Frequent monitoring of FBS and HbA1c levels, along with regular fetal assessments, is crucial to prevent complications. **Correct Answer:** D. 90 mg/dl.