Repeat Late GDM Testing and Cesarean Delivery Rates

Overview

The goal of this randomized trial is determine if re-testing for gestational diabetes in the third trimester after an ultrasound measurement of estimated fetal weight (EFW) or abdominal circumference greater than 90%ile decreases cesarean delivery rate, and to evaluate the optimal method of re-testing. The main question it aims to answer is: Does repeat testing for gestational diabetes and management of hyperglycemia decrease the cesarean delivery rate in fetuses measuring \>90%ile by estimated fetal weight (EFW) or abdominal circumference (AC) on ultrasound in the third trimester. Participants will be randomized into two groups: Group 1 will undergo a repeat glucose tolerance test (GTT) with blinded continuous glucose monitor (CGM) and group 2 will have no intervention. Participants in group 1 will receive nutrition counseling as this would be standard in patients at high risk for gestational diabetes.

This will be a prospective randomized control trial to determine if re-testing for gestational diabetes in the third trimester after an ultrasound measurement of estimated fetal weight (EFW) or abdominal circumference greater than 90%ile decreases cesarean delivery rate, and to evaluate the optimal method of re-testing. Pregnant women will be recruited with gestational age between 30 weeks and 36 weeks gestation with an ultrasound that demonstrates a fetus with either estimated fetal weight (EFW) \>90%, abdominal circumference (AC)\>90% or both. They will be randomized into two groups: Group 1 will undergo a repeat glucose tolerance test (GTT) with blinded continuous glucose monitor (CGM) and group 2 will have no intervention. Participants in group 1 will receive nutrition counseling as this would be standard in patients at high risk for gestational diabetes. The primary outcome is cesarean delivery. Labor course, complications, and delivery/neonatal data will be obtained.