Before you read this let me warn you that this deals with Padme's death. I also recommend that if you don't wish to know about Padme's death don't visit TFN for a couple of days. Now on with the spoiler. This is from Darth Friday
Obi-Wan was sent to the new planet to "break up" a meeting of the Separatists at the location. Padme also has tracked down Anakin there. When she finds Anakin, he has already dispatched all the Seperatist leaders.
She is still not full term yet in her pregnancy. Anakin only believes she is pregnant with one child.
Anakin force-chokes Padme and throws her aside as Obi-Wan ignites his saber and the duel begins.
When the twins are born, it is not due to Padme going into labor, but out of necessity to rescue them from her before she passes.
The twins are born on a brand new never-before seen world.
Let me tell you I'm really lost by this. I can't believe that it is Anakin that is responsioble about Padme's death. I wish I knew more.