title: [Attempt to establish a relationship between ultraviolet irradiation and early spontaneous abortions].
mesh_terms: D000022:Abortion, Spontaneous / Q000453:epidemiology / Q000209:etiology*; D002031:Bulgaria; D005260:Female; D006294:Health Resorts; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012621:Seasons; D014466:Ultraviolet Rays / Q000009:adverse effects*
vernacular_title: Opit za ustanoviavane na vruzka mezhdu ultravioletovoto obluchvane i rannite spontanni aborti.