- 0Jun 25, '11 by mnbrnMy ob unit (post-partum, high risk ante-partum) is expanding to include gyn surgeries (breast, hysterectomies, etc). What book do you recommend to learn more about this new population? I have the AWONN core guide to maternal-newborn because I am interested in certification. But, now with the new pts that will be on the floor, I want to be prepared. What do you suggest?