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Revised Radiocarbon Chronology for the Stone Age in South Africa

✍ Scribed by VOGEL, J. C.; BEAUMONT, P. B.

Book ID
109682237
Publisher
Nature Publishing Group
Year
1972
Tongue
English
Weight
232 KB
Volume
237
Category
Article
ISSN
0028-0836

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## Abstract Menarcheal age was estimated for 287 (188 Black; 99 White) urban South African girls born in Soweto‐Johannesburg in 1990. The median menarcheal age for Blacks was 12.4 years (95% confidence interval (CI) 12.2, 12.6) and 12.5 years (95% CI 11.7, 13.3) for Whites. Data from six studies of