As of April 2025, the American College of Obstetricians and Gynecologists (ACOG)
no longer advises women to take fluoride supplements if they live in an area with
"inadequate water fluoridation." They removed their web page that includes fluoride:

ACOG equated "inadequate water fluoridation" with high-risk conditions,
including osteoporosis, breast cancer, cardiovascular disease, and much more.

See the page they deleted last April.