Whether you plan to study individually or as part of a group, Nurse Builders C-ONQS Review Study Cards are an excellent adjunct to your C-ONQS Exam preparation. Using C-ONQS Review Study Cards is an effective and efficient way to review important obstetric and neonatal quality and safety content in preparation for the C-ONQS Exam. Use these study cards to review important information for the C-ONQS Exam.