Hello hokevin,

Placental abruption is a clinical diagnosis. Antenatal bleeding after 24 weeks usually painful will be the symptoms. Commonly acute, onset is frequently sudden and can be minor or major, presentations are varied. For instance, it could be revealed with vaginal bleeding or concealed (within abdomen)with no vaginal bleeding. Duration from time of onset is difficult to pin point. From clinical perspective, it may be more practical and appropriate for the medical staff involved to comment.

Hope this is helpful!

With best regards,
Dr Ong Yeu Theng Charas