Twins, single gestational sac, 9 weeks

Images by Genevieve Carbonatto

A 9 week pregnant lady presents to the Emergency department with PV spotting. Her scan shows a  retroverted uterus and  twin pregnancies within one gesttaional sac. These are monozygotic twins. It is difficult to identify each twin seprately but there are definately 2 heart beats visible which can both berecorded using M mode.

2 heart beats are  visible within the single gestational sac

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Both fetal heart beats recorded using M mode

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