这只能叫乳房过早发育 - Premature thelarche

N years ago, my master's thesis was about this.

Here is a reference for you:

http://www.ncbi.nlm.nih.gov/pubmed/3137242


You can also google to pull out more publications. For example:

https://www.google.com/?gws_rd=ssl#q=premature+thelarche+causes

所有跟帖： 

• you can also go to baidu.com search with 乳房过早发育 or 乳房早发育 -致青春- ♀ (0 bytes) () 06/04/2014 postreply 07:22:56