You'll find a way to make it work. It won't be easy at first, but once you find a comfortable pattern you'll be fine. babies just want attention, so I would read statistics flashcards to them in a Dr, Suess tone. They can't tell the difference. I also read my study guides into a voice recorder and listened to it with headphones while I rocked the baby to sleep. maybe I think too highly of myself, but I feel like I'm incredibly capable of multitasking since my babies trained me so well.
Then again, that was for a master's degree, so the phd world may he much harder.