title: Twin placentation and some effects on twins of known zygosity.
mesh_terms: D001724:Birth Weight; D002455:Cell Division; D010064:Embryo Implantation; D005260:Female; D005326:Fetal Proteins / Q000032:analysis; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D007231:Infant, Newborn; D008431:Maternal-Fetal Exchange; D010929:Placentation; D011247:Pregnancy; D014427:Twins; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic
chemical_list: D005326:Fetal Proteins; D007074:Immunoglobulin G