title: [Current problems of the birth rate in Yambol District].
mesh_terms: D000022:Abortion, Spontaneous / Q000453:epidemiology; D001723:Birth Rate; D002031:Bulgaria; D005260:Female; D005298:Fertility; D006801:Humans; D009790:Occupations; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology; D012959:Socioeconomic Factors
vernacular_title: Suvremenni problemi na razhdaemostta v Iambolski okrug