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profile picture of Excerpted from The Baby Bump, Twins and Triplets Edition
Excerpted from The Baby Bump, Twins and Triplets Edition

Twins 101: Types of Twins

Dichorionic, diamniotic, monochorionic, monoamniotic — wondering what it all means? We've broken it down.
1

Dichorionic Diamniotic

Fraternal or identical twins who have their own placenta and amniotic sac.

Photo: Megan Rojas / The Bump
2

Monochorionic Diamniotic

Identical twins who share the same placenta but have different amniotic sacs.

Photo: Megan Rojas / The Bump
3

Monochorionic Monoamniotic

Identical twins who share the same placenta and amniotic sac.

Photo: Megan Rojas / The Bump