• Early Pregnancy, Bleeding
  eMedicine
• Hemorrhage During Pregnancy. Sonography and MR Imaging
  AJR 2001; 176:607-615
• Incidence and outcome of bleeding before the 20th week of pregnancy: prospective study from general practice
  BMJ 1997;315:32-34 (5 July)
• Threatened miscarriage: evaluation and management
  BMJ 2004;329:152-155 (17 July), doi:10.1136/bmj.329.7458.152 n
• Vaginal bleeding in early pregnancy
  World Health Organization

Patient Oriented

• Bleeding During Pregnancy Overview
  eMedicine
• Bleeding in Pregnancy / Placenta Previa / Placental Abruption
  Children's Hospital of The King's Daughters Health System
• Nosebleeds During Pregnancy
  Vhi Healthcare
• Rectal Bleeding During Pregnancy
  BabyCenter
• Vaginal Bleeding During Pregnancy
  MedlinePlus
• Vaginal Spotting or Bleeding During Pregnancy
  Blue Cross and Blue Shield of Minnesota