Prenatal diagnosis of cord entanglement in monoamniotic multiple pregnancies

C. M. Bilardo; B. Arabin

doi:10.3109/14722240108500454

Prenatal diagnosis of cord entanglement in monoamniotic multiple pregnancies

C. M. Bilardo, B. Arabin^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Monoamniotic (MA) twins occur in about 2–5% of monochorionic (MC) pregnancies. The condition is characterized by late splitting of the developing embryo at around 8–9 days after fertilization and may also occur in higher-order multiples. During the first trimester, ultrasound diagnosis in MC-MA twins is based on visualization of only a single aniotic cavity without an intertwin membrane, and can be confirmed by the presence of only one yolk sac. The visualization of cord entanglement confirms the diagnosis at any stage of pregnancy, and has important implications for further management. Criteria for the proper diagnosis of MC-MA multiple gestation and cord entanglement are given.

Original language	English
Pages (from-to)	365-371
Number of pages	7
Journal	Ultrasound Review of Obstetrics and Gynecology
Volume	1
Issue number	4
DOIs	https://doi.org/10.3109/14722240108500454
Publication status	Published - 1 Jan 2001
Externally published	Yes

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10.3109/14722240108500454

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Cite this

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title = "Prenatal diagnosis of cord entanglement in monoamniotic multiple pregnancies",

abstract = "Monoamniotic (MA) twins occur in about 2–5% of monochorionic (MC) pregnancies. The condition is characterized by late splitting of the developing embryo at around 8–9 days after fertilization and may also occur in higher-order multiples. During the first trimester, ultrasound diagnosis in MC-MA twins is based on visualization of only a single aniotic cavity without an intertwin membrane, and can be confirmed by the presence of only one yolk sac. The visualization of cord entanglement confirms the diagnosis at any stage of pregnancy, and has important implications for further management. Criteria for the proper diagnosis of MC-MA multiple gestation and cord entanglement are given.",

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AB - Monoamniotic (MA) twins occur in about 2–5% of monochorionic (MC) pregnancies. The condition is characterized by late splitting of the developing embryo at around 8–9 days after fertilization and may also occur in higher-order multiples. During the first trimester, ultrasound diagnosis in MC-MA twins is based on visualization of only a single aniotic cavity without an intertwin membrane, and can be confirmed by the presence of only one yolk sac. The visualization of cord entanglement confirms the diagnosis at any stage of pregnancy, and has important implications for further management. Criteria for the proper diagnosis of MC-MA multiple gestation and cord entanglement are given.

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