I am just getting caught up on my reading and following the thread about
menses returning early and the possible causes.  Just as an anecdote, my
son was exclusively breastfed until 5 months (and still nursing at 3 1/2
years and counting).  However, my period returned at 6 WEEKS
postpartum.  I never supplemented and we nursed at least 12 times a day
for the first 15 months and at least 8 times a day for the first 2 1/2
years.  The only reason for the early return of menstruation that I
could figure is high estrogen levels due to excess weight.  That could
be another reason beyond supplementing and contraceptive pills.  Just my
two cents.

Lisa in Maryland