I, too, had no milk for my first child.  I had gained weight extremely
fast during that pregnancy, despite a strict diet and exercise regime.
I gained 40 lbs, but it looked more like 60, I was so bloated in my
face and neck.  I went from a C cup bra to a DD cup.  After a rather easy
labor and quick delivery, I tried everything to breast feed (baby was
starving), but no luck.  Finally the doctor (who just kept telling me to
"relax"!) suggested I buy a good quality electric breast pump which
generated about an ounce of very clear, slightly milky fluid if I used it for
half an hour every four hours.

Dr. never checked my thyroid at that time, just the T4 when I was
about
two months pregnant.

Second pregnancy, four years later.  I had "flu" for a month (high
fever, antibiotics) during the fourth month.  Baby was born 3 lbs smaller
than her sister, but after being in the birth canal for over a week.  I
had contractions but did not dilate until I had increasing doses of
Pitocin for seven hours after my water broke.  Baby and I almost died during
delivery (my blood pressure was 60/40).  Her apgar score was 6 (compared
to 9 for sis).  For this baby, I had lots of milk!

It is interesting to consider that all that heartache trying to breast
feed the first time may have been due to my flaky thyroid.