[Biological protective mechanisms during pregnancy].
D000818:Animals; D000917:Antibody Formation; D003602:Cytotoxicity, Immunologic; D005260:Female; D007108:Immune Tolerance; D051379:Mice; D008809:Mice, Inbred C3H; D011247:Pregnancy; D011270:Pregnancy, Animal; D050378:T-Lymphocytes, Regulatory / Q000276:immunology