Season of birth influences the timing of first menstruation

American Journal of Human Biology : the Official Journal of the Human Biology Council
Katarzyna KliśIwona Wronka

Abstract

The purpose of this study was to determine whether the month of birth influences the maturation rate of Polish females from two birth cohorts, namely 1982-1984 and 1992-1994. It was also verified whether socioeconomic status (SES) is capable of altering the above relationship. The research material consisted of data collected in two cross-sectional surveys. The first cohort involved 1,008 female secondary-school students, the second, 671 female university students. Information on subjects' date of birth, SES, and the age at menarche was obtained from a questionnaire. The subjects were divided into four groups, according to the month of birth: born in spring (III-V), born in summer (VI-VIII), born in autumn (IX-XI), and born in winter (XII-II). Next, the subjects were divided into two groups: born in summer months (VI-VIII) and born in the other months (IX-V). In the first cohort, subjects born in the summer reach menarche significantly earlier than subjects born in other seasons. The same tendency was noticeable in subjects born in the years 1992-1994; however, the differences were not statistically significant. In both cohorts, girls born in summer months had their first menstruation at a younger age than girls born in other m...Continue Reading

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Citations

Sep 30, 2017·Annals of the New York Academy of Sciences·Elisabetta AurinoJere R Behrman
Feb 6, 2020·American Journal of Human Biology : the Official Journal of the Human Biology Council·Paulina Pruszkowska-PrzybylskaNiels Morling
Dec 15, 2019·American Journal of Human Biology : the Official Journal of the Human Biology Council·Grażyna LiczbińskaMagdalena Kosińska
Nov 10, 2020·American Journal of Human Biology : the Official Journal of the Human Biology Council·Karolina MiłkowskaGrazyna Jasienska
Dec 11, 2020·Journal of Developmental Origins of Health and Disease·Alexander Vaiserman

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