I always assumed that if someone with a Jusenkyo curse became pregnant they'd
be locked in that form until they had delivered their child. It seems to me
that nature would ultimately be more powerful than a curse and that life would
seek to preserve itself... Since Ms. Takahashi once said of Ranma becoming
pregnant: "I don't think about it, and neither should you," I think you're at
liberty to intterpret such an event however you'd like;-)

Jeremy