Ectopic (extrauterine) decidual tissue can be a site of bleeding during pregnancy.
Types of ectopic decidual tissue:
(1) endometriosis
(2) molar-pregnancy implants
(3) ovarian stroma
(4) other progesterone-responsive mesenchymal cells
Triggering hormone: progresterone
Bleeding may range from minor to severe. Massive bleeding may occur within the peritoneal cavity. Hemoptysis may occur with pulmonary endometriosis.
A woman with a concurrent coagulopathy or anticoagulant therapy would be more likely to have greater bleeding.
A biopsy taken from the bleeding site will show decidualized tissue.
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Specialty: Obstetrics & Gynecology
