My husband is a doctor, and one of the coolest gifts he got for his Med School graduation was a tablet with the Hippocratic Oath written in Greek. I'm not sure if your partner is a med student or not, but that might be a cool gesture. You can find it on Amazon. If they go that route, they might also want to get a nice little stand for it too.
Otherwise, a gift certificate for an hour-long massage or some other spa services might be very welcome! There will be days when she is super-stressed and it would very welcome to have some professional pampering.