Van Rensburg, S.J.; Van Niekerk, C.H.; Jansen, B.C.
(Pretoria : Government Printer, 1968)
Reproductive patterns were studied in the majority of 46 mares before obtaining the ovaries for examination at slaughter. Steroids identified and determined were progesterone and 20∝-hydroxypregn-4-en-3-one in the corpora ...