What are diamniotic monochorionic twins?

Diamniotic monochorionic twins are like two best friends who share a big room but have separate little beds.

Imagine you and your sibling both live in the same house, that’s the chorion, which is like a shared wall. But each of you has your own bedroom, those are the amnios, or the fluid-filled sacs around each baby. So, even though they share one big space (the chorion), they each have their own little world inside.

Being diamniotic means there are two amnios, like two separate bubbles in a bubble bath. Each twin has their own bubble, so they can move around without bumping into each other too much.

Being monochorionic means there’s just one chorion, like one big shared wall between the two rooms. This means the twins share some of the same space and can sometimes hear or feel what the other is doing, kind of like sharing a wall with your sibling.

So diamniotic monochorionic twins are like two friends who each have their own bedroom but live in the same house, they’re close, but still have their own little space to be themselves.