File:Monochorionic twin placenta 01.jpg

From Embryology

Monochorionic_twin_placenta_01.jpg(600 × 455 pixels, file size: 220 KB, MIME type: image/jpeg)

Monochorionic Twin Placenta

Monochorionic twin pregnancies increased risk of perinatal mortality/morbidity due to:
  • twin-twin transfusion syndrome (TTTS)
  • selective intrauterine growth restriction (sIUGR)
  • higher incidence of congenital heart malformations
  • arteries - blue and green
  • veins - red and yellow
  • white star - large arterio-arterial anastomosis
  • blue stars - several arterio-venous anastomoses
  • green stars - veno-arterial anastomoses

Monochorionic placenta after color dye injection showing typical features of unequal sharing.

Twin B Twin A
  • velamentous cord insertion (white arrow)
  • small placental territory (left side)
  • paracentral cord insertion (grey arrow)
  • larger placental territory (right side)

Links: Monochorionic twin placenta | Monochorionic triamniotic triplet placenta | Placenta Abnormalities | Twinning | Placenta Development


<pubmed>23050183</pubmed>| PMC3462376 | Case Rep Pediatr.


Copyright © 2012 S. B. de Haseth et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Figure 3


Cite this page: Hill, M.A. (2024, May 23) Embryology Monochorionic twin placenta 01.jpg. Retrieved from

What Links Here?
© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

File history

Click on a date/time to view the file as it appeared at that time.

current20:41, 11 June 2013Thumbnail for version as of 20:41, 11 June 2013600 × 455 (220 KB)Z8600021 (talk | contribs)==Monochorionic Twin placenta== Monochorionic placenta after color dye injection (blue and green colors for arteries, red and yellow colors for veins) showing typical features of unequal sharing. Twin B has a velamentous cord insertion (white arrow) a...