CausesBy Mayo Clinic staff
Known causes of polyhydramnios include:
- A birth defect that affects the baby's gastrointestinal tract or central nervous system
- Maternal diabetes
- Twin-twin transfusion — a possible complication of identical-twin pregnancies in which one twin receives too much blood and the other too little
- A lack of red blood cells in the baby (fetal anemia)
- Blood incompatibilities between mother and baby
Often, however, the cause of polyhydramnios isn't clear.
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- Polyhydramnios. March of Dimes. http://www.marchofdimes.com/pregnancy/complications_polyhydramnios.html. Accessed Oct. 6, 2011.
- Ross MG, et al. National institute of child health and development conference summary: Amniotic fluid biology - basic and clinical aspects. The Journal of Maternal-Fetal Medicine. 2001;10:2.
- Gilbert WM. Amniotic fluid disorders. In: Gabbe SG, et al. Obstetrics: Normal and Problem Pregnancies. 5th ed. Philadelphia, Pa.: Churchill Livingstone Elsevier; 2007. http://www.mdconsult.com/das/book/body/208746819-4/0/1528/0.html. Accessed Oct. 6, 2011.
- Strehlow SL, et al. Diabetes mellitus & pregnancy. In: DeCherney AH, et al. Current Diagnosis & Treatment Obstetrics & Gynecology. 10th ed. New York, N.Y.: The McGraw-Hill Companies; 2007. http://www.accessmedicine.com/resourceTOC.aspx?resourceID=9. Accessed Oct. 10, 2011.
- Carlo WA. High-risk pregnancies. In: Kliegman RM, et al. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, Pa.: Saunders Elsevier; 2011. http://www.mdconsult.com/das/book/body/208746819-6/0/1608/0.html. Accessed Oct. 11, 2011.
- Screening for birth defects. American College of Obstetricians and Gynecologists. http://www.acog.org/publications/faq/faq165.cfm. Accessed Oct. 10, 2011.
- Special tests for monitoring fetal health. American College of Obstetricians and Gynecologists. http://www.acog.org/publications/faq/faq098.cfm. Accessed Oct. 10, 2011.