title: Plasma progesterone, androstenedione and testosterone concentrations in freemartin heifers.
abstract: Plasma concentrations of testosterone, androstenedione and progesterone in freemartins, and normal cyclic and non-cyclic heifers were studied. The plasma testosterone concentrations were in general less than 10 pg/ml in all animals. The mean androstenedione concentration of 28 pg/ml in 10- to 12-month-old freemartins was significantly lower than the mean of 58 to 60 pg/ml for normal 10- to 12-month-old heifers. At 24 months of age the mean androstenedione concentration in the freemartins had risen significantly to 65 pg/ml.
mesh_terms: D000367:Age Factors; D000735:Androstenedione / Q000097:blood*; D000818:Animals; D002417:Cattle; D005611:Freemartinism / Q000097:blood*; D008297:Male; D011374:Progesterone / Q000097:blood*; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone; D000735:Androstenedione; D011374:Progesterone