Causes of Early (<20 Weeks) and Late Bleeding in Pregnancy  - Differential Diagnosis Algorithm

Early Bleeding in Pregnancy (<20 Weeks):

 • Not Bleeding from the Os

 • Cervix Open - Passing Tissue and Clots

 • Cervix Open - Not Passing Tissue and Clots

 • IUP on Transvaginal U/S

 • ß-hCG doubled in 72h

 • ß-hCG not doubled in 72h 

Late Bleeding in Pregnancy (2nd & 3rd Trimester):

 • Bleeding from Os - Painful

 • Bleeding from Os - Painless

 • Not Bleeding from the Os



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