0301 basic medicine 030219 obstetrics & reproductive medicine Cleavage Stage, Ovum Obstetrics and Gynecology Embryo Epiphenomenon Biology Embryo, Mammalian Cell biology 03 medical and health sciences 030104 developmental biology 0302 clinical medicine medicine.anatomical_structure Blastocyst Reproductive Medicine Feature (computer vision) Cleavage stage medicine Humans Function (biology) Developmental Biology