Schwarzenberger F,Toole G S,Christie H L.Plasma levels of several androgens and estrogens from birth to puberty in male domestic pigs[J].Acta Endocrinologica.1993,128(2):173-177
Fent R W,Wettemann R P,Johnson R K.Breed and heterosis effects on testeicular development and endocrine function of puberal boars[J].Journal of Animal Science.1983,57(2):425-432
[5]
Egbunike G N.Development of puberty in Large White boars in a humid tropical environment[J].Acta Anatomica.1979,104(4):400-405
[6]
Lun S,Smith P,Lundy T.Steroid contents and steroidogenesis in vitro by the developing gonad and mesonephros around sexual differentiation in fetal sheep[J].Journal of Reproduction and Fertility.1998,114:131-139
[7]
Lunstra D D,Ford J J,Klindt J.Physiology of the Meishan boar[J].Journal of Reproduction & Fertility Supplement.1997,52:181-193
[8]
CLARK A M,Samaras S E,Hammond J M.Changes in the messenger ribonucleic acid for insulin-like growth factor- Ⅰ and - Ⅱ in the porcine testis during and between two waves of testicular development[J].Biology of Reproduction.1994,50:993-999
[9]
Christenson R K,Ford J J,Redmer D A.Estradiol and testosterone metabolic clearance and production rates during puberal development in boars[J].Biology of Reproduction.1984,31:905-912