Effects of serum starvation and re-cloning on the efficiency of nuclear transfer using bovine fetal fibroblasts

agonistas agoniste agonists blastocyst body fluids calves castration cerdo desarrollo embrionario echographie echography ecografia embryonic development feto fibroblaste fibroblastos fibroblasts foetus gestation gnrh gonadotrophine gonadotropin releasing hormone gonadotropinas gonadotropins hormona liberadora de gonadotropina lh liquide biologique noyau cellulaire nucleo nucleus oestrogens oocytes ova ovariectomia ovariectomie ovariectomy ovule porcin pregnancy swine ternero ultrason ultrasonics ultrasonido ultrasonography veau