I would agree that the house has been sporadically occupied since the 1840's.  So let's say the upstairs is fairly well modernized and even part of the basement.  The lab/morgue/operating area can be behind an unlocked door in the basement that takes you from the finished section to the untouched area from the 1800's.<br/><br/>One neat idea could be a little concealed but not secret closet in Jessy's room that might have some stuff from older days.  I could see stuff from the 30's in a little closet that was forgotten.  The attic could be stuff with things as well as part of the detached garage.<br/><br/>Hmmm... the ghost of the doctor still around and still trying to get pregnant.  I like that!   She could affect all three of the women in the story (Helen, Jessy and Peter's GF).  They don't have to get pregnant necessarily but could get the urge or even have memories or feelings of being pregnant.