They are better for the environment because they don't require developing.
They can be viewed on a computer monitor within seconds of taking the image.
They can be enhanced and enlarged for better diagnostics.
They can be sent to other providers in an instant via email.
Twins can either be Mono-zygotic (Identical) Which means they develop from one zygote which splits and forms two embryos, or Di-zygotic (fraternal) meaning that each twin develops from two different eggs and each egg is fertilized by a different sperm cell.
I am not sure which one may be your answer.
But
I Hope This Helped!
