yes it is possible but very slim chances usually they die right before hatch. if they do make it they live a very short life and usually have like 3 or 4 legs or double headed ect. or the extra limbs die off, it depends how the 2nd twin is attached and what connects them.
there is even with room usually not enough room for them in egg so they either die in shell or are born as conjoined siamese twins, i think that's what they r called. i've never heard of a set of actual identical twins hatching from them from 2 complete sets of yolk/white within not attched together. it's always been conjoined somehow like it is with people but there maybe cases of it i just haven't heard. if u look at the ripleye's believe it or not site online u can see some with 4 legs ect.