title: Observations on the development in vitro of early (13-day) and later (15-day) porcine embryos.
mesh_terms: D000818:Animals; D003470:Culture Media; D004622:Embryo, Mammalian / Q000033:anatomy & histology / Q000502:physiology*; D005314:Embryonic and Fetal Development; D005865:Gestational Age; D066298:In Vitro Techniques; D013552:Swine / Q000196:embryology*
chemical_list: D003470:Culture Media