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Definition:
When monozygotic twins are contained in a shared chorion, they are referred to as monochorionic. The chorion is the outer membrane of the sac surrounding a fetus in utero. Monochorionic twins can be either monoamnionic or diamnionic.
Related Terms
• Chorion
• Dichorionic
• Monoamnionic
• Monozygotic
The Process of Twinning
This diagram contrasts the difference between monozygotic and dizygotic twins. It illustrates the different scenarios that can exist in amnionic cavity structure.
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Monochorionic
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