I think camel twin is very rare and the chance is one in one million. A friend sent me this picture of the twin abortion in the desert. I really wished to see the twins but again not succeeded.
The Camel Reproduction
Camel is poor in reproductive performance in a good way to stay in tune with the scarcity of poor and scarce food and water supply in the deserts. Camel has a longer gestation period and a longer age at first calving.