Understanding fetal positioning is not as simple as noting the differences between 1 position, anterior, with another position, posterior. There are many nuances, such as
- how much the chin is tucked towards the chest,
- the shape of the inlet and
- the size of the outlet,
- the synclitism of the baby's head,
- the activity of the mother and
- the strength of her labor.
- Even whether her amniotic sac is intact or ruptured can make a difference.
As we learn something new about fetal positions and how babies rotate we can forget older concepts that still hold their own value when looking a large group of posterior births.
We know that posterior births involve more complications and interventions that anterior births, when comparing groups of births. (Not necessarily a single posterior or anterior birth.)
We know that in labors where the baby begins labor in a posterior position, about 30% of the babies will still be posterior at the end of birth
that of first time moms whose babies have been posterior in labor, 29% will have a cesarean operation to finish their births.
We don't know an easy activity for all mothers to do to prevent a posterior labor.
We don't know an easy activity for all mothers to correct a posterior fetal position.
We don't really know which babies will rotate out of the posterior position into an anterior (and easier) position and finish the birth vaginally.
But, I do know, that in the mothers I help through pregnancy and in labor, that there are some important activities that mothers can do to either help their babies rotate themselves into a better position, or to descend through the pelvis to be born either posterior or occiput transverse.
Please see the Short List of What to Do in Pregnancy. Its on the SpinningBabies.com website.