blood luteinizing hormone amount EFO:0007002 The proportion, quantity, or volume in whole blood, serum, or plasma of LH, the hormone that regulates steroid production by the interstitial cells of the testis and the ovary. circulating luteinizing hormone level serum levels of luteinizing hormone serum levels of lutropin VT:0002773 Trait.ontology blood luteinizing hormone level serum levels of LH blood gonadotropin amount blood pituitary hormone amount