NURS 323 Lecture Notes - Lecture 12: Fetus, Perineum, Pelvic Brim
9 Jan 2021
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Document Summary
5 p"s that affect labour: passenger (fetus, placenta) Lie: relation of the long axis (spine) of the fetus compared to the long axis of the mother. Presentation: part of the fetus that enters the pelvic inlet first. Attitude: relation of the fetal body parts to one another. Position: relation of the presenting part to the 4 quadrants of the mother"s pelvis. Engagement: moment when the presenting part"s largest transverse diameter has passed through the mother"s pelvic brim. Station: refers to a measure of the descent of the presenting part in the birth canal. Zero station: determined by drawing an imaginary line between the maternal ischial spines: passageway (birth canal) dilation station position presenting part effacement (measured in percentage) - the stretching of the cervix consistency status of membranes. Gynecoid pelvis: 50% of women have this pelvic, which is conductive to vaginal births.
