Are There Identical Quintuplets?

The odds of having identical quintuplets are estimated to be 1 in 15 million, according to About.com. Multiple embryos created via assisted reproductive technology are not uncommon, but these embryos are more commonly multizygotic, or fraternal embryos. Multiple embryos from the same egg are called monozygotic. Due to the rarity of multiple births from natural methods, it is almost unheard of to have monozygotic babies beyond twins or triplets.