a pituitary stimulation test with gonadotropin-releasing hormone ( gnrh ) and thyrotropin-releasing hormone ( trh ) was undertaken to determine ( 1 ) whether pituitary responses to gnrh vary in individual women taking oral contraceptive steroids over time , ( 2 ) whether a less suppressive pituitary gonadotropin effect is produced by formulations containing less than 50 microgram of estrogen , and ( 3 ) to obtain more information concerning prolactin secretion in users of oral contraceptive steroids .
C0040162
thyrotropin-releasing hormone
C0032002
pituitary