Bimodal distribution of fasting, one and two hour post load plasma glucose in Asian Indian pregnant women without pre-gestational diabetes: Gestational age related changes

• After exclusion of pre-gestational diabetes, Asian Indian pregnant women have bimodal distribution of plasma glucose. • Bimodality is observed for fasting, 1 and 2 h post glucose load plasma glucose distribution. • Cut off values for gestational diabetes diagnosis could not identified for any glucose parameter. • In women with high gestational diabetes risk factors, the bimodality is evident before 24 weeks of gestation. • By third trimester, the bimodality is significant for all glucose parameters.