Retroplacental complex

Retroplacental complex (RPC) is the region behind the placenta and is composed of decidua basalis and portions of myometrium including the maternal veins which drain the placenta.

  • visualised post 20 weeks of gestation
  • seen as an echo-poor, subplacental region with linear horizontal echoes representing venous channels
  • Doppler flow is noted within the vascular channels
  • the thickness can go up to 9.5 mm

Prominent retroplacental complex in an anteriorly placed placenta may be a cause of torrential bleeding during invasive procedures such as Caesarean section or amniocentesis.

Abdominal and pelvic anatomy
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Article information

rID: 38474
System: Obstetrics
Section: Anatomy
Tags: refs, cases
Synonyms or Alternate Spellings:
  • RPC
  • Retroplacental complex (RPC)
  • Retro-placental complex (RPC)

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