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. 2013 Jan 18;4:1–21. doi: 10.2147/AHMT.S15946

Figure 1.

Figure 1

Decline in age at menarche, by ethnicity.

Abbreviations: NHANES, National Health and Nutrition Examination Surveys; NHB, non-Hispanic black; NHES, National Health Examination Survey (1963–1970); NHW, non-Hispanic white.