Fig. 3.
Fetal glucose and insulin concentrations during glucose-stimulated insulin secretion (GSIS). Fetal arterial plasma glucose (A) and insulin (B) concentrations were measured during the square wave hyperglycemic clamp, which began at time 0. Solid squares, CON; open squares, HG. *P < 0.05 between CON and HG. Values are means ± SE.