The birth canal would be a draining place to such a one, he thought.

The birth canal is only a few inches long, but in my mind it might as well be miles.

The child's young mother was a small woman with an extremely narrow birth canal.

The birth canal for them was like a water slide.

Find out how far the baby has moved down the birth canal (station).

Sometimes, one or both of the baby's feet are pointed down toward the birth canal.

He suggested the sign should also be posted "at the end of the birth canal."

The cut is made just before the baby's head comes out of the birth canal.

The station of the head must be at least +2 in the lower birth canal.

Second and later children often make their way through the birth canal a little faster.