Twins are two offspring produced by the same pregnancy. Twins can either be monozygotic (“identical”), meaning that they can develop from just one zygote that will then split and form two embryos, or dizygotic (“fraternal”), meaning that they can develop from two different eggs, each are fertilized by separate sperm cells.
In contrast, a fetus which develops alone in the womb is called a singleton, and the general term for one offspring of a multiple birth is multiple
We found some twin baby pictures that were too cute not to share and you will love them. Here is what they seem to be saying: Click “Continue Reading” to see them