RT Book, Section A1 Posner, Glenn D. A2 Posner, Glenn D. A2 Dy, Jessica A2 Black, Amanda A2 Jones, Griffith D. SR Print(0) ID 1106375703 T1 Fetopelvic Relationships T2 Oxorn-Foote Human Labor & Birth, 6e YR 2015 FD 2015 PB McGraw-Hill Medical PP New York, NY SN 9780071740289 LK obgyn.mhmedical.com/content.aspx?aid=1106375703 RD 2024/10/09 AB DefinitionsLIE Relationship of the long axis of the fetus to the long axis of the mother.PRESENTATION The part of the fetus that lies over the inlet. The three main presentations are cephalic (head first), breech (pelvis first), and shoulder.PRESENTING PART The most dependent part of the fetus, lying nearest the cervix. During vaginal examination, it is the area with which the finger makes contact first.ATTITUDE Relationship of fetal parts to each other. The basic attitudes are flexion and extension. The fetal head is in flexion when the chin approaches the chest and in extension when the occiput nears the back. The typical fetal attitude in the uterus is flexion, with the head bent in front of the chest, the arms and legs folded in front of the body, and the back curved forward slightly.DENOMINATOR An arbitrarily chosen point on the presenting part of the fetus used in describing position. Each presentation has its own denominator (i.e. occiput, sacrum, mentum, frontum).POSITION Relationship of the denominator to the front, back, or sides of the maternal pelvis.