Jerri
Jerri asked Lois McMaster Bujold:

This question contains spoilers… (view spoiler)

Lois McMaster Bujold
It's mostly natural at first, plus demon-supported general good health, till Pen's suicide attempt at the end of his Martensbridge years gave Des a huge scare. After that, and deploying all the medical knowledge accumulated over three physician-sorcerers' practices, it's mostly Des, very intent and getting better at it as she goes.

Yes, this has been in Pen's writer's mind for a while.

:-), L.

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