The aim was to measure umbilical cord testosterone and androstenedione
and to explore possible relationships with fetal weight and insulin l
evels. Testosterone, androstenedione and insulin were measured at birt
h in venous umbilical blood in 12 infants of gestational diabetic moth
ers and in 12 control subjects. The mean concentrations of umbilical t
estosterone and androstenedione were not significantly different betwe
en the infants of the diabetic and control mothers. No significant cor
relation was found between maternal weight, fetal weight or insulin co
ncentrations and androgen levels.