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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Growth curves: comparing differences between animals naturally conceived (NC) and those born after fresh embryo transfer (FT), vitrified embryo transfer using a ministraw (VTs), and vitrified embryo transfer using Cryotop (VTc).