title: Relationship between plasma androstenedione and testosterone concentrations during the day in young postpubertal bulls.
mesh_terms: D000735:Androstenedione / Q000097:blood*; D000818:Animals; D002417:Cattle; D002940:Circadian Rhythm; D007700:Kinetics; D008297:Male; D012741:Sexual Maturation; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone; D000735:Androstenedione