The hypothesis that the vacation-study-expectancy scholar regime produces most of the monthly rhythm of the age at menarche (AaM) was tested. Studies on monthly menarche incidence (MI) refuted climatic factors as a main ...

Background: Menarche is the last stage of pubertal development, which coincides, with the completion of longitudinal growth. Our aim was to evaluate, post-menarcheal growth and clinical variables proposed to be associated ...

Background: Our previous studies have shown that the monthly rhythm of menarche is associated to the expectancy of holidays or vacations. If this hypothesis is true, menarche episodes in Chile should cluster in December, ...

The objective was to analyze the relationship between socioeconomic status and age at menarche among indigenous and non-indigenous girls in the Araucanía Region of Chile, controlling for nutritional status and mother's age ...

The photoperiod and temperature were ruled out as main factors of the annual menarche rhythm. Vacations associate to peaks and study periods to troughs of menarche. Some months show contradictory behavior according to ...

Childhood intake of animal foods is associated with age at first menstrual period (menarche). It is unknown whether the micronutrients present in these foods could explain this association. Our objective was to investigate ...