Gestational Diabetes Management
Prenatal Care and Delivery
- The American Diabetes Association recommends avoiding routine delivery before 38 weeks in the absence of maternal or fetal compromise, as no data supports this practice, and prolonging pregnancy beyond 40 weeks requires intensified fetal surveillance 1
- Women with well-controlled gestational diabetes should be taught to monitor fetal movements during the last 8-10 weeks of pregnancy, and intensified fetal surveillance is recommended when pregnancy continues beyond 40 weeks, maternal hyperglycemia is severe, or other adverse clinical factors are present, with a strength of evidence based on clinical guidelines 1
- The American College of Obstetricians and Gynecologists (ACOG) recommends delivery during the 38th week of gestation for patients with gestational diabetes mellitus (GDM), as prolongation of pregnancy beyond 38 weeks increases the risk of fetal macrosomia without reducing cesarean rates 2, 3
- Increased surveillance is appropriate when fasting glucose levels exceed a certain threshold or pregnancy progresses past term, with a higher risk of fetal demise and potential need for earlier delivery 2, 3
- For GDM pregnancies complicated by fetal growth restriction, delivery at 38-39 weeks is recommended for those with normal umbilical artery Doppler and estimated fetal weight between the 3rd-10th percentile, while delivery at 37 weeks is recommended for those with decreased diastolic flow or severe growth restriction (below 3rd percentile) 4
- The risk of shoulder dystocia increases significantly in GDM pregnancies with macrosomic fetuses, with a risk of 19.9-50% when birth weight exceeds 4,500g 5
- GDM itself is not an indication for cesarean delivery, and reclassification of maternal glycemic status should be performed at 4-12 weeks postpartum, with a recommended screening method of a 75g oral glucose tolerance test 6
- Breastfeeding should be encouraged to reduce the risk of maternal type 2 diabetes, and antenatal corticosteroids should be administered if delivery is anticipated before 34 weeks of gestation 4, 6