title: Specificity, avidity, and size of B-lymphocyte populations during ontogeny.
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000276:immunology; D000917:Antibody Formation; D000918:Antibody Specificity; D000921:Antibody-Producing Cells / Q000166:cytology*; D001402:B-Lymphocytes / Q000166:cytology* / Q000276:immunology; D005260:Female; D008099:Liver / Q000166:cytology / Q000196:embryology / Q000276:immunology; D051379:Mice; D011247:Pregnancy; D013154:Spleen / Q000166:cytology / Q000276:immunology