Kurtz Filho, M., Deprá, N.M., Alda, J.L. de, Castro, I.N. de, De La Corte, F.D., Silva, J.H.S. da and Silva, C.A.M. 1997. Gestation length related to the age in Thoroughbred mares, to placenta’s and newborn foal’s weight and parturition time. Brazilian Journal of Veterinary Research and Animal Science. 34, 1 (Feb. 1997), 37-40. DOI:https://doi.org/10.11606/issn.2318-3659.v34i1p37-40.