Both BRCA1 and BRCA2 mutation carriers had a median parity of 2.0 live births and age at menarche of 13 years. (jamanetwork.com)
«Ultimately this reinforces the importance of including age of menarche in many more studies.» (sciencedaily.com)
The use of soy formula in the WIC program, which supplies free formula to welfare mothers, may explain the astronomical rates of early menarche in African American girls. (westonaprice.org)