title: Sex ratio in the Iranian urban and rural areas.
abstract: Factors affecting the sex ratio are examined using data for 1,169,489 births occurring in rural and urban districts of Tehran, Iran, between 1971 and 1979.  Attention is given to geographic, socioeconomic, psychological, and nutritional factors.  It is found that "male births occurred more in Winter and Spring in the urban and rural areas, respectively.  Female births occurred more in Fall in both urban and rural areas.  Mean sex ratio was 108.20 in rural and 105.44 in urban areas."  Reasons for the differentials between urban and rural areas are suggested.
authors.forename: D D
authors.initials: DD
authors.lastname: Farhud
authors.forename: M S
authors.initials: MS
authors.lastname: Kamali
authors.forename: M
authors.initials: M
authors.lastname: Marzban
authors.forename: N
authors.initials: N
authors.lastname: Nevisi
mesh_terms: D001208:Asia; D001519:Behavior; D003710:Demography; D003906:Developing Countries; D004467:Economics; D005843:Geography; D006262:Health; D007492:Iran; D009747:Nutritional Physiological Phenomena; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics; D011584:Psychology; D012424:Rural Population; D012621:Seasons; D017678:Sex Distribution; D012737:Sex Factors; D012744:Sex Ratio; D012959:Socioeconomic Factors; D014505:Urban Population
keywords: Asia; Behavior; Demographic Factors; Developing Countries; Economic Factors; Geographic Factors; Health; Iran; Nutrition; Population; Population Characteristics; Population Dynamics; Psychological Factors; Rural Population; Seasonal Variation; Sex Distribution; Sex Factors; Sex Ratio--determinants; Socioeconomic Factors; Southern Asia; Urban Population