NURS 335 Study Guide - Cervical Dilation, Uterine Contraction, Trilobite

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14 May 2023
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Four p"s: interrelated components that make up the process of labor and birth. Powers forces that cause the cervix to open and that propel the fetus downward through the birth canal. 2 powers = uterine contractions + mother"s pushing efforts. Uterine contractions primary powers of labor during the first stage (from onset until full dilation of the cervix) involuntary smooth muscle contractions woman cannot consciously cause them to start or stop. Intensity and effectiveness are influenced by many factors. Walking, drugs, maternal anxiety, and vaginal exams. Cause the cervix to efface (thin) and dilate (open) to allow the fetus to descend in the birth canal. Before labor cervix is tubular structure about 2-3. 8 cm long. The cervix thins and shortens d/t contractions simultaneously pushing the fetus downward as they pull the cervix upward (think like pushing a ball out of the cuff of a sock)

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