Provider: Moravian Museum, Brno, Czech Republic TY - JOUR JO - Anthropologie (Brno) TI - Secular Changes in Age at Menarche in 1924-197O in Northern Moravia (Czechoslovakia) AU - Hajn V Y1 - 1988 VL - 26 IS - 1 PB - Moravian Museum, Brno, Czech Republic SN - 0323-1119 SP - 25 EP - 30 KW - Menarche KW - Seasonality of menarche KW - Acceleration KW - Secular trends in the onset of menarche KW - Mean age at menarche KW - Menarche and solar activity N2 - N2 - The present study is the result of longitudinal research of influences on the onset on menarche caused by living conditions. Further numbers of families living in Northern Moravia, Czechoslovakia, were examined. Seasonality of menarche in the course of a year and trends in the onset of menarche were studied, both the phenomena in correlation with the conditions of the womens' growth from their birth to the onset of menarche. At the same time the possible influence of changing solar activity on the onset of menstrual cycles was investigated. ER -