title: Decreased levels of helper T cells: a possible cause of immunodeficiency in pregnancy.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007108:Immune Tolerance; D007231:Infant, Newborn; D007743:Labor, Obstetric; D007958:Leukocyte Count; D008297:Male; D049590:Postpartum Period; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D013601:T-Lymphocytes / Q000276:immunology*