Oo naman pwede, mommy! Half bath is totally fine during pregnancy, marami sa amin na pregnant gumagawa nito especially pag gabi para hindi mainitan or para sa comfort, kaya go lang. But since pregnancy can sometimes bring unexpected things, mas safe kung i-check mo muna with your OB kung okay lang talaga for you personally, lalo na kung may any complications or concerns ka, better safe than sorry, diba?