Shared genetic aetiology of puberty timing between sexes and with health-related outcomesThe problem here is that the age at which voices broke is based on recollection and we all know that memory can be pretty inaccurate. In a study like this the difference between a few months could make a huge difference, but with data collected from 55,871 men the effect of inaccuracies is likely to be greatly reduced since it would be just "statistical noise" that would be easy to disregard.
Here, we report the first large-scale GWAS (genome-wide association study) of puberty timing in males, based on recalled age at voice breaking in men in the 23andMe study. By combination with data on recalled age at menarche in women, we show that the genetic architecture of puberty timing has a substantial shared component between males and females, which also overlaps the genetic basis of several health-related traits and diseases.
LINK:
http://www.nature.com/ncomms/2015/151109/ncomms9842/full/ncomms9842.html