Before childbirth, it sometimes happens that the fetus is in a position with its buttocks towards the cervix. This is the breech position (3% of births). Certain maneuvers make it possible to turn the fetus around so that its head descends into in the mothers pelvis. If the maneuvers fail, natural childbirth is still possible if the size of the motherˇs pelvis allows it, if the baby is not too big, if the quantity of amniotic fluid is sufficient, and if the umbilical cord and the babys head are properly positioned. If this is not the case, a cesarean section is performed. Occasionally, a baby may present itself shoulder first, which excludes any possibility of natural childbirth.