The Embryo Develops into a Fetus

The Embryo Develops into a Fetus and Picotopia are two minute ONAs about the growth of cells into something larger. 

Extremely short web animations (few seconds long) that are more of artist experimenting/showcasing their artstyle than trying to put together a coherent story or idea. 

In both, the proces of evolving (or devolving) of embryo is shown, and each anime shows it in an original way. Both are somewhat educational anime where the process of human birth is shown.