to study the pituitary luteinizing hormone ( lh ) , follicle-stimulating hormone ( fsh ) , prolactin ( prl ) , and thyroid-stimulating hormone ( tsh ) secretory capacity and to determine whether the gonadotropes , lactotropes , and thyrotropes have a circatrigintan cycle of variation under hormonal contraception , women under combined oral contraceptive steroid treatment were challenged with a combination of 100 micrograms of gonadotropin-releasing hormone ( gnrh ) and 200 micrograms of thyrotropin-releasing hormone ( trh ) given intravenously at weekly intervals .
C0033371
prolactin
C1327616
secretory