Mary,
It is very common for women to lose hair post partum. The amount and length
of time vary greatly. I have never seen it in print as being associated
with breastfeeding although I would suspect it is hormonal. Anecdotally, I
lost tons of hair with all three of my children. It lasted about 6 months
and I was sure I would go bald but never did (thank goodness). It came out
in handfuls every time I washed my hair. By the way, my first was bottle
fed and the other two breastfed, so the feeding method didn't make any
difference with me.
Diane Karnbach, LLLL