Changes in Breast Size: Exploring Historical Trends & Potential Factors

Question
MY WIFE IS VERY LARGE BREASTED...I WAS SITTING AROUND WITH SOME FRIENDS AND WE STARTED TALKING AND I BROUGHT UP A QUESTION....
I GRADUATED HIGH SCHOOL IN 1984 A LARGE BREASTED WOMAN WAS A RARE THING....I HAVE NOTICED THAT ALOT OF WOMEN HAVE LARGER SIZES THAN BACK THEN.
IM NOT TALKING ABOUT IMPLANTS NATURAL.
IS THERE A REASON WHY THEY ARE BIGGER NOW THAN BACK THEN...IS IT DIET...OR WHAT...IM CURIOUS..THANK YOU

Answer
Thank you for your question, Phil.  I appreciate it!

I believe it's true that the average woman today has bigger breasts.  I agree with you that breast implants, which a very small percentage of women actually get, does not account for this.

The main reason that girls are going through puberty earlier (in some cases as early as the age of nine)is due to better nutrition.  This is also the cause of the general increase in breast size.  

Thanks again,

Alex