EFFECTS OF DIHYDROTESTOSTERONE AND 5α-ANDROSTANE-3α, 17β-DIOL ON SERUM CONCENTRATIONS OF LH AND FSH IN THE PREPUBERTAL BULL | Zendy

RICHARD I. KENNEDY | Zendy; N. C. Rawlings | Zendy; Susan Cook | Zendy

Open Access

EFFECTS OF DIHYDROTESTOSTERONE AND 5α-ANDROSTANE-3α, 17β-DIOL ON SERUM CONCENTRATIONS OF LH AND FSH IN THE PREPUBERTAL BULL

Author(s) -

RICHARD I. KENNEDY,

N. C. Rawlings,

Susan Cook

Publication year - 1985

Publication title -

canadian journal of animal science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.377

H-Index - 64

eISSN - 1918-1825

pISSN - 0008-3984

DOI - 10.4141/cjas85-010

Subject(s) - endocrinology , dihydrotestosterone , medicine , testosterone (patch) , silastic , castration , androstane , chemistry , biology , androgen , hormone

Administration of silastic implants releasing dihydrotestosterone or 5α-androstane-3α, 17β-diol to 4-, 14- and 20-wk-old bull calves depressed serum concentrations of LH and FSH, both prior to and following castration. The results suggest that 5α-reduced androgens may be involved in the establishment of negative feedback control of gonadotropins, prior to significant testicular testosterone production. Key words: Bull calves, puberty, androgens, gonadotropins

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