I know that Corsets were just underwear and generally fitted to the wearer, and tightlacing was not the norm in the eras that wore them, but what did pregnant women wear as undergarments when the belly got in the way?

by ButHowWillILearn
mimicofmodes

There's always more that can be said, but I have an answer to this question here: During the time of corsets and tight waisted dresses for women what would they wear during pregnancy?