[Studies on various parameters and etiology of sterility in Bulgaria].
D000328:Adult; D000367:Age Factors; D002031:Bulgaria; D002908:Chronic Disease; D005260:Female; D006801:Humans; D007247:Infertility, Female / Q000453:epidemiology / Q000209:etiology*; D012424:Rural Population; D014505:Urban Population
Prouchvaniia vurkhu niakoi parametri i etiologiiata na steriliteta u nas.