Pseudomonoamniotic Pregnancy: Case Report and Review of Etiologic Considerations

Avinash S. Patil, Jessica Martin, Katharine Tsukahara, Anja Skljarevski, Katherine Miller, Rachel Towns, Frank Schubert

Research output: Contribution to journalArticle

2 Scopus citations


Pseudomonoamniotic gestations are increasingly recognized through sonographic surveillance of monochorionic twins, though etiologic factors remain undefined. We present a case of spontaneous pseudomonoamniotic twins and propose umbilical cord insertion proximity as a sonographic marker. Systematic review of the literature was performed and additional cases with similar findings were noted. Approximately 75% of reported cases (28/37) were deemed spontaneous and several included short inter-cord distances. Shunting of blood away from the membranes in the region between the cord insertions may be responsible for membrane rupture. Further investigation is needed into short inter-cord distance as a marker for monochorionic twins at risk to become a pseudomonoamniotic gestation.

Original languageEnglish (US)
Pages (from-to)413-421
Number of pages9
JournalFetal and Pediatric Pathology
Issue number6
StatePublished - Nov 2 2015


  • monochorionic
  • pseudomonoamniotic
  • twins

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Pediatrics, Perinatology, and Child Health

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