I'm not a fan, but not because I'm trying to be the arbiter of taste. I'm giving my reaction since maybe some others will have the same--just as some YLF'ers think it's great.
For what it's worth, I never thought the US images during my pregnancy were "cute"--even though I'm in a medical field. I thought they were kind of ghoulish and I much preferred visualizing the whole fetus/baby development with all the skin on.
I think visually it does overlap with grimacing dead baby, since skeletons on Halloween typically represent the dead, and not just "here's what we look like alive when we're under Xray. "
So, it may just depend on how "safe" you want to play it. Agree not so good for kiddies--more of an adult party item. But it's not a huge deal either way.