Patil, Avinash S.Martin, JessicaTsukahara, KatharineSkljarevski, AnjaMiller, KatherineTowns, RachelSchubert, Frank P.2016-04-282016-04-282015Patil, A. S., Martin, J., Tsukahara, K., Skljarevski, A., Miller, K., Towns, R., & Schubert, F. P. (2015). Pseudomonoamniotic Pregnancy: Case Report and Review of Etiologic Considerations. Fetal and Pediatric Pathology, 34(6), 413–421. http://doi.org/10.3109/15513815.2015.1075633https://hdl.handle.net/1805/9443Pseudomonoamniotic 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.enPublisher Policymonochorionictwinspseudo-monoamnioticArticle