Normally, the placenta should separate from the uterine cavity once a child has been delivered. Whether the child is delivered through a vaginal delivery or caesarean section, the placenta will be expelled after birth. However, if the child has not yet been born, but the placenta begins to separate, partially or substantially, the placental abruption, as it is known, can become life threatening to both mother and unborn child.
The dangers. The placenta is the channel between mother and fetus, providing the child with nutrients and oxygen. If the placenta separates from the uterine wall, the child can be deprived of these nutrients and oxygen, and it can also lead to heavy blood loss for the mother.
Placental abruption most commonly occurs in the final quarter of pregnancy and can present symptoms in many forms, including vaginal bleeding, stomach pains, uterine tenderness, or frequent contractions.