WHAT DOES TYPE I VASA PREVIA LOOK LIKE?
Type I vasa previa occurs when one or more of the baby's placental or umbilical blood vessels cross the entrance to the birth canal beneath the baby.
When the cervix dilates or the membranes rupture, the unprotected vessels can tear, causing rapid fetal hemorrhage.
When the baby drops into the pelvis, the vessels can be compressed, compromising the baby's blood oxygen supply and causing oxygen deprivation.