Prolapse of the amniotic sac ('hourglass membranes')

John P McGahan, H. E. Phillips, M. S. Bowen

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Prolapse of the amniotic sac through the partially dilated cervical os in pregnancy is called 'hourglass membranes'. Ultrasonography may be useful in identifying the presenting fetal or intra-uterine parts within the bulging membranes.

Original languageEnglish (US)
Pages (from-to)463-466
Number of pages4
Issue number2
StatePublished - 1981

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology


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