title: Miscarriage: uncertainties remain.
mesh_terms: D000026:Abortion, Habitual / Q000276:immunology / Q000517:prevention & control*; D000022:Abortion, Spontaneous / Q000209:etiology*; D005260:Female; D006801:Humans; D017710:Lymphocyte Transfusion; D011247:Pregnancy; D016585:Vaginosis, Bacterial / Q000150:complications*