Recommendationsc Test for undiagnosed diabetes atthe first prenatal visit in thosewith risk factors, using standard diagnosticcriteria. Bc Test for gestational diabetes mellitusat 24–28 weeks of gestation inpregnant women not previouslyknown to have diabetes. Ac Test womenwith gestational diabetesmellitus for persistent diabetesat 4–12 weeks postpartum, usingthe oral glucose tolerance test andclinically appropriate nonpregnancydiagnostic criteria. Ec Women with a history of gestationaldiabetes mellitus shouldhave lifelong screening for the developmentof diabetes or prediabetesat least every 3 years. Bc Women with a history of gestationaldiabetes mellitus found tohave prediabetes should receive intensivelifestyle interventions or