International Journal of Human Diversity and Evolution
Coverage: 1923-1941 (Vols. I-XIX) & 1962-2023 (Vols. 1-61)
ISSN 0323-1119 (Print)
ISSN 2570-9127 (Online)
Journal Impact Factor 0.2
News: Volume 62 Issue 2 is in progress.

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'Hajn V, 1988: Secular Changes in Age at Menarche in 1924-197O in Northern Moravia (Czechoslovakia). Anthropologie (Brno) 26, 1: 25-30'.
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.
Menarche - Seasonality of menarche - Acceleration - Secular trends in the onset of menarche - Mean age at menarche - Menarche and solar activity

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