Monochorionic twins
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Monochorionic twins are monozygotic twins that share the same placenta. If the placenta is shared by more than two, these are monochorionic multiples. Monochorionic twins occur in 0.3% of all pregnanc
Abdominal ultrasonography of monoamniotic twins at a gestational age of 15 weeks. There is no sign of any membrane between the fetuses. A coronal plane is shown of the twin at left, and a sagittal plane of parts of the upper thorax and head is shown of the twin at right.
λ Sign in 8 week pregnancy
Exsanguination
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Exsanguination is the loss of blood from the circulatory system of a vertebrate, usually leading to death. The word comes from the Latin 'sanguis', meaning blood, and the prefix 'ex-', meaning 'out of
Monochorionic twins
…of the other twin's heart, resulting in twin reversed arterial perfusion. If one twin dies in utero, blood accumulates in that twin's body, causing exsanguination of the remaining twin. In the case of monoamniotic twins the risk of complications is substantially higher because of additional potential umbilical…
15th-century depiction of exsanguination as part of Jewish ritual slaughter of animals for consumption