Monochorionic diamniotic twin pregnancy

Case contributed by Dr Maulik S Patel


Ultrasound for confirmation of pregnancy and dating.

Patient Data

Age: about 25 yrs
Gender: Female

One gestational sac with 2 yolk sacs , 2 fetal poles with cardiac activity.

Case Discussion

Findings suggest twin pregnancy of monochorionic diamniotic (MCDA) type.  Although the intertwin membrane is not clearly seen, the presence of two yolk sac is highly suggestive of an MCDA (rather than MCMA) pregnancy.

In this case, there was relevant family history, as the patient herself is one of twins and there was positive twin pregnancy history on patient's paternal side.

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Case information

rID: 27271
Published: 26th Jan 2014
Last edited: 14th Aug 2019
System: Obstetrics
Inclusion in quiz mode: Included

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