Media, kits, and methods for cultivation of mammalian embryos front fertilized oocyte stage to blastocyst stage in the presence of N-benzyl-3,5-dicarbcthoxy-4-phenyl-l,4-dihydropyridine. The use of this supplement improves the early embryonic development, in particular the quality of zygotes and the blastocyst formation. The supplemented media can be used with pigs, humans, or other mammals N-benzyl-3,5-dicarbelhoxy-4-phenyl-1,4-dihydropyridine may be added to known media, and used for with vitro fertilization methods.