Hormone levels in plasma of ewes induced into lactation H. H. HEAD, C. DELOUIS, J. FEVRE, G. KANN, M. TERQUI, J. DJIANE, J. PONT, M. MARCEL, P. BOLIFRAUD and B. BONICEL Reprod. Nutr. Dévelop., 22 4 (1982) 641-650 DOI: 10.1051/rnd:19820506