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1. This is a picture of a monochoionic diamnionic placenta with twin to twin transfusion syndrome. There is velamentous insertion of the cord on the left side. This was the smaller donor twin (B). When one looks carefully at the blood vessels that came from the insertion of the cord and go to the placenta, one will see some white streaks in the veins – they are thrombi. Birth weights were recipient baby (A) 1400g and donor baby (B) 925g at 29 weeks. Both did well.