when injected at the daily dose of 100 microgram on days 7 through 12 of pregnancy , the luteinizing hormone ( lh ) -releasing hormone ( lhrh ) agonist [ d-ala6 , des-gly-nh2 ( 10 ) ] lhrh ethylamide led to complete suppression of pregnancy and a 45 % to 60 % decrease in plasma progesterone concentration .
C0032961
pregnancy
C0033308
progesterone