title: The plasma concentrations of testosterone and LH during the ovulation cycle of the hen (Gallus domesticus).
abstract: The plasma concentrations of testosterone and luteinizing hormone (LH) were measured by radioimmunoassay during the ovulation cycle of the hen. The baseline concentrations of testosterone were 100 to 250 pg/ml and the maximum concentration of 904 pg/ml was observed 6 h before ovulation. The possibility that testosterone is the ovarian excitation hormone which initiates the ovulation-inducing surge of LH is discussed.
mesh_terms: D000818:Animals; D002645:Chickens / Q000097:blood*; D005260:Female; D007986:Luteinizing Hormone / Q000097:blood*; D010060:Ovulation; D011863:Radioimmunoassay; D013739:Testosterone / Q000097:blood*; D013997:Time Factors
chemical_list: D013739:Testosterone; D007986:Luteinizing Hormone