During the third trimester, your healthcare provider will regularly check your baby’s position using abdominal palpation (feeling your abdomen from the outside).
They assess:
- the baby’s head
- back
- bottom
- and limbs
As pregnancy progresses, most babies move into a head-down (cephalic) position and begin to descend into the pelvis.
Movable (not engaged) head
If your baby’s head is still above or just entering the pelvis, it may be described as not engaged or movable.
At this stage:
- the head can still be gently moved during an exam
- the baby may still change position
For first-time pregnancies, the head often engages before labor begins. If you’ve had a previous birth, engagement may not happen until labor starts.
Are there any risks?
If your water breaks while the baby’s head is still high, there is a small risk of umbilical cord prolapse, where the cord slips down ahead of the baby.
This is a medical emergency. If your water breaks and your provider has told you the baby’s head is not engaged, contact your healthcare provider or go to the hospital right away.
Engaged head
When the baby’s head has moved down into the pelvis and is no longer easily moved, it is called engaged.
At this point, the baby is less likely to change position.
Fixed (deeply engaged) head
A fixed or deeply engaged head means the baby’s head is firmly positioned in the pelvis and cannot be moved during examination.
Does the baby’s head need to be engaged before labor starts?
No. Labor can begin whether or not the baby’s head is engaged. In first pregnancies, engagement often happens before labor. In later pregnancies, it commonly happens during labor itself. Both patterns are normal.
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