<unk>  <unk>  AE) is an obstetric complication defined as "fetal vessels crossing or running in close proximity to the inner cervical os. These vessels course within the membranes (unsupported by the umbilical cord or placental tissue) and are at risk of rupture when the supporting membranes rupture."
Vasa praevia
Obstetrical hemorrhage
Maternity blues
Placenta accreta
Parasitic twin
Placenta previa
Gestational trophoblastic disease
Arbor vitæ