From A & P (anatomy and physiology- too many years ago to remember in a 
happy way) I learned that most girls begin to menstruate at approximately 
the same age as their mothers.  I find this to be usually true in practice. 
Precocious puberty (very early) is another whole story.  And PCOS and 
metabolic syndrome are affecting very obese young women. :-(

I goggled age of first menstruation and got an interesting web site 
www.mum.org/menarage.htm
Bet you didn't know there was a museum of menstruation!  One of the 
interesting points was that the age of first menses declining was first 
noticed in the past 100 years and it is attributed to better nutrition and 
health.  The earlier ages being seen now are attributed to obesity and 
environmental factors.
1860-16.6
1920-14.6
1950-13.1
1980-12.5
1992-12.2 

             ***********************************************

To temporarily stop your subscription: set lactnet nomail
To start it again: set lactnet mail (or digest)
To unsubscribe: unsubscribe lactnet
All commands go to [log in to unmask]

The LACTNET mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software together with L-Soft's LSMTP(R)
mailer for lightning fast mail delivery. For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html