Causes of Early Bleeding in Pregnancy (< 20 Weeks) - Differential Diagnosis Algorithm Not Bleeding from the Os: • Cervical polyp/Ectropion • Cervical/Vaginal neoplasm • Vaginal laceration • Infection Cervix Open - Passing Tissue and Clots: • Complete abortion • Incomplete abortion • Ectopic pregnancy Cervix Open - Not Passing Tissue and Clots: • Missed abortion • Inevitable abortion • Cervical insufficiency IUP on Transvaginal U/S ß-hCG doubled in 72h • Viable pregnancy — monitor for ectopic or IUP (implantation bleed) ß-hCG not doubled in 72h • Ectopic pregnancy or failed pregnancy #Early #Bleeding #Pregnancy #Differential #Diagnosis #Algorithm #Causes #Obstetrics #OBGyn