Determination by echography of uterine changes around puberty in gilts and evaluationof a diagnosis of puberty Françoise Martinat-Botté, Eric Royer, Eric Venturi, Christian Boisseau, Philippe Guillouet, Vincent Furstoss and Michel Terqui Reprod. Nutr. Dev., 43 3 (2003) 225-236 DOI: 10.1051/rnd:2003022