Double Embryo Transfer. Transferring two embryos at the same time to a woman undergoing IVF.

Dichorionic twins

Twins that each have their own placenta and gestational sac. They are usually non-identical, although it is sometimes possible that they are identical if the embryo splits very early.

Dizygotic twins (non-identical twins)

Dizygotic twins form when two separate eggs are fertilised by separate sperm (two zygotes). These twins are no more alike than any other brothers or sisters.