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Normal Labor 1

Study tools for Physiology & Stages of Labor

QuestionAnswer
Prodromal The period of time prior to labor characterized by contractions or other signs/symptoms of impending labor that may be intermittent or constant; shortening active labor by effacing the cervix and positioning tthe presenting part.
Sagittal suture This suture divides the cranial vault in half running between the two parietal bones.
Posterior fontanelle Y-shaped landmark formed by the meeting of the occiputal and parietal bones.
Anterior fontanelle Diamond Shaped landmark formed by the junction of the sagittal, frontal and coronal sutures.
Flexion As the fetal spine curves, the head is encouraged to tuck causing the posterior fontanelle to present in a vertex birth.
Moulding Under the influence of the external pressures and forces of labor, the fetal parts alter shape and structure by contact with the soft and bony tissues of the pelvis.
Internal rotation Occurs when the most anterior portion of the presenting part meets the resistance of the pelvic floor muscles.
Muscular gates Cervix, muscles of the levator ani sling and the genital opening.
Pelvic ligaments These assist the presenting part to remain anterior after internal rotation has occurred.
Gynecoid The most nearly round pelvic shape at all levels.
Placental separation Signaled by lengtheing of the cord and a gush of blood.
Zero station The presenting part reaches the level of the ischial spines.
Synclitism When the biparietal diameter of the fetal head is parallel with the planes of the pelvis.
Disengagement Emergence of the presenting part from the outlet.
Lightening Aproximately 2 weeks before labor the presenting part descends into the true pelvis.
Bloody show Blood tinged mucus often seen 24-48 hours before true labor.
Friedman's curve A labor pattern often rigidly defined as normal in a hospital birth setting.
Partograph Visual representation of the labor pattern.
Duncan mechanism Delivery of the placenta with the maternal side presenting.
Schultz mechanism Delivery of the placenta with the fetal side presenting.
Created by: chduffy
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