At birth, the baby is positioned with feet or bottom toward the cervix

When baby is aligned in the uterus to come out buttocks first, as opposed to head first

A baby is said to be breech presentation, or breech position, when it is "bottom down" rather than "head down" in the uterus just before birth. Either the baby's bottom or feet would be born first. Around 3-4% of full-term babies are positioned this way.