title: Letter: Is it all IgG?
mesh_terms: D005260:Female; D006801:Humans; D007112:Immunity, Maternally-Acquired; D007074:Immunoglobulin G; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000276:immunology*; D008431:Maternal-Fetal Exchange; D011247:Pregnancy
chemical_list: D007074:Immunoglobulin G