hi i found this doing some research on it for you its from webmd's site <link> but if you google boric acid safe why pregnant you will find lots of mixed answer for and against. do hope this helps. good luck
i'm 20 weeks pregnant and was using boric acid to kill roaches. it was in contact with my hands. did i hurt may baby? . i was using the boric acid powder to make the bait for the roaches hence my hands were exposed to the powder. i did not inhale or swallowed the boric acid. i washed my hands with vinegar after using the powder. could boric acid get to my blood stream? did i hurt my baby by doing that? is external use of boric acid harmful to the baby?