Khrysty, you would automatically think that because they hatched from the same egg it would mean they have to be monozygotic or identical twins... This can go one of two ways...
Polar Body Twining is the result of one egg splitting and then being fertilized by a separate sperm making the offspring "half identical"... This is very rare and has not been studied enough to be proven...
So what could have happend here??? Its pretty simple actually... Leopard geckos have two eggs per clutch... This makes the clutchmates dizygotic or fraternal twins in all cases... What most likely went on here is that 3 eggs were droped from the ova, all 3 eggs were ferilized by seperate sperm... The egg follicle then formed over one fertile egg and the other follicle formed over two feralized eggs...
So basically reptile and bird eggs are external placentas if that makes it easier to understand... What we are seeing here is an actual case of triplets and not twins...