it is concluded that in pregnancy ( 1 ) hypothalamic control of maternal adrenal secretion still prevails , ( 2 ) the increase in total cortisol is essentially due to that of cbg , ( 3 ) the unbound cortisol is normal or , at times , slightly increased and ( 4 ) variations in the pt/true cbg ratios may be explained by the presence of steroids ( progesterone and 17-oh-progesterone ) with a high affinity for cbg .
C0033308
progesterone
C0020387
17-oh-progesterone