Birth canal images. Birth Canal Stock Photos & Birth Canal Stock Images - Alamy

Birth canal images. What is the Birth Canal?

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Your baby in the birth canal

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Giving birth feels like a miracle for many reasons, one of which is the way a baby's head squeezes through a mother's narrow birth canal. Doctors know that this is possible due to the flexible birth canal expanding to make room for the baby's head. As it passes through, the head also temporarily changes shape and becomes elongated to fit into the limited passage. While these are all well-documented, the exact mechanisms of the process have never been observed in real time nor thoroughly analyzed and understood, until now. The MRI scans took place twice: between 36 and 39 weeks of their pregnancy, then during labor when their cervixes are already fully dilated. Bones that did not overlap prior to labor were observed to overlap during labor in all seven infants, which means all of their heads showed deformation during the process. Five of the babies bounced back quickly with their heads returning to their pre-labor shapes soon after delivery.