title: [Light and shadow in the factors of sterility].
mesh_terms: D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000209:etiology*; D007248:Infertility, Male / Q000209:etiology*; D008297:Male; D011247:Pregnancy
vernacular_title: Luz y sombra en los factores de esterilidad.