This document contains definitions and key points related to obstetrics nursing. It defines terms like impending delivery, Ritgen's maneuver, fundal height, hemorrhage and infection checks postpartum. It also outlines stages of labor like cervical dilation, placental delivery, and lochia checks post-fourth stage. Other topics covered include sexual intercourse during pregnancy, HCG function, fluid retention causes, oxytocin production, and vitamin K dosage for full and preterm infants. Fundal pressure techniques and dangers are also defined.