Develop when two eggs each get fertilized by two different sperm, resulting in two zygotes in the uterus at the same time.

It is called dizygotic twins. In light of their being two separate zygotes, the hereditary cosmetics of dyzygotic twins is unique, and hence they are not indistinguishable. By and large, these twins will share half of their qualities, much the same as some other match of kin. Besides, they might be a similar sex or be a male and female combine. 

Ihaven't done that yet, so no idea,but this is not the right place to ask