Here are a few pictures from Dr. Frances B. Glenn's work with prenatal fluoride. These are baby teeth.

Baby teeth form during pregnancy. The effects of fluoride are:
(1) A nice white color.
(2) No cavities (97%).
(3) "Plumper" teeth - like nice smooth molars in back.
(4) The enamel is smooth and glossy, like the inside of a sea shell.

Cavities