Not real up on HPPA, but doesn’t it deal with info from health care providers and not individual patients directly giving the info? I’d hate to think that asking someone if they are feeling ok, and eliciting a response resulting in liability.
If a person gets fired for their response ... questions of liability naturally arise.
I believe that HPPA has, as part of its privacy stipulations, that employers cannot ask or otherwise inquire about personal medical information. I believe pregnancy (and the date of conception) would certainly fall under that umbrella.