Age at menarche in girls born from 1985 to 1989 in Mazandaran, Islamic Republic of Iran
AbstractThis cross-sectional study was carried out on 2246 girls born between 1985 and 1989 to determine the age of menarche in Mazandaran province, northern Islamic Republic of Iran. Six cities were selected randomly and cluster sampling used to select high-school students in urban and rural areas. Students with malnutrition, anaemia and chronic infections such as tuberculosis were excluded. The mean [standard deviation] age of menarche was 12.5 [1.1] years, 95% CI: 12.45-12.55 years. The most frequent occurrence of menarche was in summer and least frequent in winter. Menarche age was significantly higher in girls living in rural areas and with fathers with lower education
Delavar, M.A. & Hajian Tilaki, K.O. (2008). Age at menarche in girls born from 1985 to 1989 in Mazandaran, Islamic Republic of Iran. http://www.who.int/iris/handle/10665/117411
EMHJ - Eastern Mediterranean Health Journal, 14 (1), 90-94, 2008
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Tehrani, F.R.; Mirmiran, P.; Zahedi Asl, S.; Nakhoda, K.; Azizi, F. (2010)There is some evidence for a decreasing age of menarche in many populations. This study examined the secular trend of age at menarche among Iranian women. Age at menarche based on recall information was recorded for 770 pairs of mother and daughters. Between 1930 and 1990 mean menarcheal age of this cohort of women decreased from 13.88 to 12.98 years [-0.15 years per decade] and mean height of the cohort increased from 152.33 to 158.43 cm [+0.99 cm per decade]. There was a significant correlation between menarcheal age of mothers and their daughters ...