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Differential Diagnosis for Bleeding at 13 Weeks Gestation

Single Most Likely Diagnosis

  • Threatened abortion: This is the most common cause of bleeding in early pregnancy, accounting for up to 50% of cases. It is characterized by vaginal bleeding with or without abdominal cramping, and the cervix is closed.

Other Likely Diagnoses

  • Missed abortion: This occurs when the fetus has died but remains in the uterus. Bleeding can be a symptom, and it's essential to differentiate it from a threatened abortion.
  • Ectopic pregnancy: Although less common at 13 weeks, ectopic pregnancy can still occur and is a significant concern due to its potential for severe complications.
  • Placenta previa: This condition, where the placenta partially or completely covers the cervix, can cause bleeding. However, it's more common in the second and third trimesters.

Do Not Miss Diagnoses

  • Molar pregnancy: A rare condition where the placenta becomes abnormal, it can cause bleeding and has significant implications for the mother's health.
  • Placental abruption: This is a life-threatening condition where the placenta separates from the uterus, causing bleeding and depriving the fetus of oxygen and nutrients.
  • Uterine rupture: Although extremely rare in the first trimester, uterine rupture can occur, especially in women with a history of uterine surgery.

Rare Diagnoses

  • Vaginal or cervical lesions: Bleeding can be caused by vaginal or cervical lesions, such as polyps or cancer, although these are rare in pregnant women.
  • Systemic diseases: Certain systemic diseases, like bleeding disorders or liver disease, can increase the risk of bleeding during pregnancy, but these are relatively rare.

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This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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