Wait, I'm not going to totally spoil you by telling you the outcome but how much do you want to know?

I'll just answer what you asked me:

1. Padme knows she's pregnant well into the film, not just at the end.
2. Anakin knows she's pregnant too (He apparently thinks it's a girl).
3. Anakin... well by his fall and after The Duel things get...confused for him. And well... I don't want to spoil that one.

(ps - feel free to squee away with me. I'm starting to get all into these films and such).