Patterns of circulating LH, FSH, prolactin and E2 17 β in the gilt during the follicular phase of the oestrus cycle Armelle PRUNIER, Sylvaine CAMOUS, J.P. RAVAULT and Françoise MARTINAT-BOTTE Ann. Zootech., 36 3 (1987) 303-304 DOI: 10.1051/animres:19870319