CYP17A1 and gestational diabetes: Since none of the Δ5 or Δ4 steroids in cord blood showed significant differences between the GDM+ and GDM− groups (Table S2), the differences in the 5α/β-reduced metabolites of 17-hydroxyprogesterone and one 5α-reduced androgen may be considered as a sign of reduced activity of maternal and/or placental CYP17A1 in GDM+ group (see [51]).