title: Ontogeny of the gut-associated immune system.
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology; D002417:Cattle / Q000196:embryology / Q000276:immunology*; D002454:Cell Differentiation; D005260:Female; D005865:Gestational Age; D007070:Immunoglobulin A / Q000276:immunology; D007075:Immunoglobulin M / Q000276:immunology; D007422:Intestines / Q000196:embryology / Q000276:immunology*; D010581:Peyer's Patches / Q000276:immunology; D011247:Pregnancy
chemical_list: D007070:Immunoglobulin A; D007075:Immunoglobulin M