1๏ธโฃ Engagement
๐ท Engagement occurs when the widest diameter of the fetal presenting part passes through the maternal pelvic inlet.
๐ท In most cephalic presentations, engagement means the biparietal diameter of the fetal head has entered the pelvis.
๐ท This movement indicates that the fetus has begun adapting to the maternal pelvic dimensions in preparation for birth.
๐ท Engagement may occur weeks before labor in first pregnancies or later during labor in multiparous clients.
๐ท Clinically, the presenting part is considered engaged when it reaches the level of the ischial spines (0 station).
2๏ธโฃ Descent
๐ถ Descent in labor refers to the downward movement of the fetus through the birth canal.
๐ถ Descent occurs throughout labor but becomes especially noticeable during the active phase and second stage.
๐ถ Factors promoting descent include uterine contractions, maternal pushing efforts, gravity, and fetal alignment.
๐ถ Progressive descent allows the fetus to move deeper into the pelvis toward delivery.
๐ถ Failure of descent may indicate cephalopelvic disproportion or ineffective labor contractions.
3๏ธโฃ Flexion
๐ท Flexion during labor occurs as the fetal head meets resistance from the cervix, pelvic walls, and pelvic floor.
๐ท The fetal chin bends toward the chest, allowing the smallest possible diameter of the head to present through the pelvis.
๐ท Flexion is important because it makes passage through the birth canal easier and more efficient.
๐ท Proper flexion reduces the diameter of the fetal head that must pass through the maternal pelvis.
๐ท Incomplete flexion may lead to more difficult labor and delivery.
4๏ธโฃ Internal Rotation
๐ถ Internal rotation occurs when the fetal head rotates to align with the maternal pelvic outlet.
๐ถ Usually, the fetal occiput rotates from a transverse position toward an anterior position under the pubic symphysis.
๐ถ This rotation allows the fetal head and shoulders to fit through the pelvis more effectively.
๐ถ Internal rotation is essential for successful vaginal birth because the pelvic inlet and outlet have different diameters.
๐ถ Abnormal rotation may contribute to prolonged labor or operative delivery.
5๏ธโฃ Extension
๐ท Extension during childbirth occurs as the fetal head reaches the vulva and passes beneath the maternal pubic symphysis.
๐ท The head extends backward so the brow, nose, mouth, and chin can emerge sequentially from the birth canal.
๐ท This movement allows the fetal head to follow the natural curve of the maternal pelvis.
๐ท Extension leads to delivery of the fetal head.
๐ท Controlled extension helps reduce maternal tissue trauma during birth.
6๏ธโฃ Restitution
๐ถ Restitution in labor occurs immediately after delivery of the head.
๐ถ The fetal head rotates back to align with the shoulders, which remain inside the maternal pelvis.
๐ถ Restitution reflects the natural untwisting of the fetal neck after internal rotation.
๐ถ This movement prepares for external rotation and delivery of the shoulders.
๐ถ Observation of restitution helps confirm normal progression of the birth process.