![]() ![]() Fifth step – ExtentionĪs fetal occiput slip below the pubic arch (which is also called crawling), the fetal head began to extend. The birth path through the pelvis isn’t straight, but rather curved, and the baby goes through a series of movements during birth in order to be born. But the shoulder does not rotate along with the head of the fetus. it causes the back of the baby’s head to rotate to anterior from its original transverse position. Forth step – Internal rotationĪs uterine contraction increases and fetal occiput advance through the maternal pelvis, it gets resistance from the maternal pelvic floor. It reduces anteroposterior diameter which makes it easier to pass through the pelvic bone. Flexion usually occurs due to resistance of the pelvic floor. it helps the baby to go down through the pelvic bone easily. The lowest diameter of the baby head is when the baby flexes its head. Decent is usually occurred after labor start due to uterine contraction and maternal pushing down effort. This is the time where your baby head moves down into the pelvis. seven discrete cardinal movements of the fetus are described: engagement, descent, flexion, internal rotation, extension, external rotation or restitution, and expulsion Dr. If this is your first pregnancy, the baby head might be engaged even before the labor started. CARDINAL MOVEMENTS IN LABOR Refer to the changes in position of fetal head during its passage through the birth canal.
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