Description

Test Criteria

Fetus A and Fetus B share the same gestational sac, with no intervening membrane visualised. However two separate yolk sacs are present, and this is highly suggestive of a monochorionic diamniotic gestation.

Fetus C is in a separate gestational sac, and is hence the dichorionic diamniotic sibling of Fetuses A and B.

Gestational age 6 weeks and 1 day