I have been certified in Inpatient OB for close to 15 years. It was a good decision and I was supported by the university after I achieved the certification. Each year I was alloted a large sum of money to use for either education, CEU's or conferences. With budget cuts it was eventually dropped. And since I work PT at another area hospital, they are very respectful of all nurses that work to maintain certification and are rewarded with pay increases. As far as studying for the exam, I started studying 6 months before taking the exam and studied for about 2 hours each day except for Saturdays. My favorite book was my OB text from school and also the guidelines for perinatal care. It helps with those issues related to patient management. Good Luck!!!