If the bleeding is severe caesarean section. If not completed 37 weeks conservative treatment is carried out as placenta praevia till completed 37 weeks. In velamentous insertion of the cord, some of the foetal vessels in the membranes cross the region of the internal os. When the membranes ruptures, the foetal vessels are torn and bleeding occurs which is usually slight. Foetal heart rate abnormalities are detected .
Foetal haemoglobin shows different ultraviolet absorption than adult haemoglobin.
Bleeding - Painless, causeless, recurrent. Usually starts slight in amount. Associated with abdominal pain. A cause may be detected. Can be felt - Dark red.