Birthing Become familiar with the common terms associated with labor and delivery. Tools A B augmentation artificial stimulation of uterine contractions attitude the degree of flexion the fetus assumes crowning the appearance of the presenting part of the fetus at the opening of the vagina engagement occurs when the presenting part of the fetus has settled into the pelvis at the level of the ischial spines fontanelle space at the intersection of sutures connecting infant skull bones labor a series of events by which uterine contractions expel the fetus and placenta from the woman's body power supplied by the fundus of the uterus and supplemented by abdominal muscles resulting in the expulsion of the fetus fetal bradycardia heart rate of 90 uterine souffle sound of blood going through the uterine blood vessels Nitrazine paper used for assessment of pH to detect ruptured membranes baseline fetal heart rate fetal heart rate when the uterus is at rest variability fluctuations in the baseline fetal heart rate pitocin stimulates uterine muscle producing contractions placenta fetal structure that provides nourishment and removes waste Footling a type of breech presentation