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Decrease in menarcheal age from 1966 to 1983 in Denmark.

P Helm, S Helm

    Acta Obstetricia Et Gynecologica Scandinavica
    |January 1, 1984
    PubMed
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    The average age of menarche, the first menstrual period, decreased by four months between 1965 and 1983 in Denmark. This trend suggests that the age at menarche continues to decline across Nordic countries.

    Area of Science:

    • Pediatrics
    • Reproductive Health
    • Public Health

    Background:

    • The age of menarche has historically shown a declining trend in many populations.
    • Understanding secular trends in menarcheal age is crucial for assessing reproductive health and pubertal development.
    • Previous studies indicated a decrease in menarcheal age in Denmark from 1949-50 to 1965-66.

    Purpose of the Study:

    • To estimate the mean age at menarche in Denmark during 1965-66 and 1982-83.
    • To analyze the secular trend in menarcheal age over this period.
    • To compare current trends with other Nordic countries.

    Main Methods:

    • The status quo method was employed to estimate the mean age at menarche.
    • Data were collected from 983 girls in 1965-66 and 1,591 girls in 1982-83 in the same region of Denmark.

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  • Statistical analysis was performed to determine the mean age and identify trends.

    • Main Results:

    • The mean age at menarche decreased by approximately four months, from 13.40 years in 1965-66 to 13.03 years in 1982-83.
    • This decrease follows a similar trend observed in earlier periods.
    • Recent data from other Nordic countries (excluding Norway) suggest a similar average age of around 13 years.

    Conclusions:

    • The trend towards earlier menarche in Denmark has continued between 1965-66 and 1982-83.
    • A halt in the declining trend of menarcheal age is not evident.
    • The findings suggest a consistent pattern of earlier puberty onset across Nordic populations.