Tip 126: oligohydramnios 2

The fetal causes of oligohydramnios include:

  • Chromosomal abnormalities, e.g. aneuploidy
  • Congenital abnormalities, especially those associated with impaired urine production, e.g. renal agenesis
  • Growth restriction (multiple causes, including maternal factors e.g. placental insufficiency)
  • Demise
  • Post-term pregnancy
  • Ruptured fetal membranes

Most cases, especially if mild / moderate, have no underlying cause found.

Reference:  Beloosesky R, Ross MG. ‘Oligohydramnios’ UpToDate May 2014.

Previously published: 17/06/14, 04/06/15

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