Okay, crazy Star Wars theory time.
I have long suspected that the "keep people from dying" technique that Palpatine/Sidious mentions to Anakin requires that someone else's life force be sacrificed, and that's why it can't be learned from a Jedi. This is arguably what we see at the end of TRoS, only instead of sucking the life out of some hapless bystander, Ben sacrifices his own life force.
Now to the actual theory: Padme did not die of childbirth, or a broken heart, or whatever. The med droids even say there's nothing medically wrong with her, but she's still slipping away. Even after everything she's been through, she's insisting to Obi-wan that there's still good in Anakin.
Padme had outlived her usefulness in Palpatine's plot to create Darth Vader, and she now represented the biggest threat to keeping him. If she lived, she would do everything in her power to drag Anakin, kicking and screaming, back into the light. And Palpatine knew it.
So Palpatine used Padme's life force to stop Anakin from dying.
Now, you might argue, Padme is a long way away from Palpatine and Vader. But Palpatine was probably extremely familiar with Padme's life force. She was only 7 when he discovered her in the junior legislature and began grooming her to be queen and then senator (and the perfect bait for Anakin). Maybe he'd already manipulated her life force. Nothing so gauche as the mind trick - Padme's too strong-willed for that anyway - but maybe he augmented her fear after the assassination attempts (which he orchestrated) so she'd be emotionally vulnerable and therefore more open to Anakin's advances. Maybe he did something to tamper with whatever birth control she was using, and that's why she got pregnant. Or maybe just the literal decades of working in close quarters with her would be enough.
We've seen force users connect over long distance, and while it's usually due to a strong bond such as master/padawan, twins, or dyads, Palpatine is exceptionally powerful, and I wouldn't put it past him to be able to locate Padme's life force from half a galaxy away. And while she was traveling rapidly in the opposite direction, she wasn't as far away as that.
Also puts a little weight of truth behind Palpatine's lie that Anakin caused Padme's death.
Anyway, just a theory that neatly ties a bunch of stuff together. Feel free to poke holes in it or write some fanfic.















