Jan writes:

<< If the woman has resumed her periods, then her estrogen/progesterone levels
 are probably about where they should be to get pregnant.  Since prolactin is
 back to normal levels, what is inhibiting pregnancy while moms are bf past 6
 months? >>

I've known two women who tried to conceive while nursing toddlers.
Menstruation had resumed several months prior.  Docs (in both cases) who were
breastfeeding friendly said that it was a problem with Luteinizing Hormone.
Both women became pregnant promptly after weaning.  Haven't seen that in
younger women.

Nancy