Well... I dont think Ron would be emotionless. I think he'd be really shocked. He'd cry, but not show it to Ginny. He'd be strong for her, and support her.
HAH

! That made me laugh. I totally agree that he'd do something like that. Typical Ronniekins!
And might I suggest something? Instead of going to a Muggle hospital, why don't they go to St Mungos? Maybe the wizards have something equivalent to an ultrasound? Like... waving their wand around the tummy and showing a projection about whats happening inside, like a smoky version of the original? (visualize it like... the Prior Incantato spell that the Ministry people use when they find Harry's wand after the Dark Mark scene in GoF. A ghostly version of the real spell...). But that's my idea, you can make it up as you like.