Joan,
BCP's and teen agers:  good point, there is a deficient proliferative phase in
a woman on oral contraceptives, this is one of their mechanisms of action.  It
would make sense that if the endometrium is not being stimulated to
proliferate fully, neither would the mammary gland?  Study anyone?  Giosi,
this might be a good one for you with your adolescent moms in Rochester!
Catherine Watson Genna, IBCLC