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A Century of Change: Unraveling the Impact of Socioeconomic/Historical Milestones on Age at Menarche and Other Female Reproductive Factors in Japan
Authors
Madoka Iwase, Yukari Taniyama, Yuriko N. Koyanagi, Yumiko Kasugai, Isao Oze, Norikazu Masuda, Hidemi Ito, Keitaro Matsuo
J-Stage
Highliths
- Change of female reproductive factors among 62,005 Japanese women born between 1890 and 1991 was evaluated.
- Age at menarche showed a significant downward trend over a century (in 1932, 1946, and 1959).
- These years coincided with historical events such as wars and economic development.
- Other female reproductive factors also showed change over time.
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