A Systematic Approach to First-trimester Ultrasound Assessment of Twins

ABSTRACT

The incidence of twin pregnancies has increased for the last 20 years mainly as a result of assisted reproduction technologies and pregnancies occurring in older women. Both maternal and perinatal mortality and morbidity are increased in twin pregnancies when compared with singletons. A systematic and detailed first-trimester ultrasound can be a useful tool for detecting chorionicity, growth discordance, and congenital malformations. Prediction of complications at an early stage can help with directing future management and counseling of patients.

KEYWORDS

First-trimester ultrasound - multiple pregnancies - chorionicity - cervical length - fetal growth - nuchal translucency

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