Furthermore, a pre-embryo can divide into twins and then recombine into a single entity.

It turned out they weren't miniatures, but grew into gigantic, beautiful twins that reach far beyond our third floor.

He had been seven hours in overdrive when the projected letters separated into twins.

If separation into identical twins occurs, 1/3 of the time it will happen before day 5.

If separation into identical twins occurs, 2/3 of the time it will happen between days 5 and 9.

One of those split into identical twins, leaving Ms. Butler pregnant with triplets.

There may be period of time before the embryo becomes individualized (up to a certain stage it can split into twins, for example).

A single fertilized egg can split into twins - turning one supposedly unique human being into two.

The Shadow hadn't transformed himself into twins, as the shouts implied.

Bidding on films became fierce, and many companies split their single theaters into twins.