INS and diabetes mellitus: Reports on sex differences in the association of maternal adiposity and neonatal adiposity are conflicting: Some find associations only in boys,35 but other studies only in girls.36, 37 Prior studies in pregnant women with diabetes have reported an interaction of foetal sex with a number of maternal variables in the prediction of large or small‐for‐gestational age new‐borns but results are not comparable since the outcome variable was not new‐born adiposity and maternal variables did not include lipids or insulin sensitivity.38