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. 2014 Dec 12;14:155. doi: 10.1186/s12905-014-0155-0

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© Lyu et al.; licensee BioMed Central. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Mean age at menarche in urban and rural women born in Southeast China between 1955 and 1985 and registered in the Perinatal Health Care Surveillance System.