Laparoscopic approaches in bovine fetuses’ umbilical structures: lateral or ventral approach? oleh F.D.O. Monteiro, B.G. Conceição, G.M.A. Santos, H.L.M. Morais, H.J. Gurgel, D.K.O. Bezerra, K.C. Rossy, T.S. Cardoso, L.P.B. Borges, C.S. Ferreira, P.P.M. Teixeira