A twin pregnancy is when there are two fetuses in the uterus at the same time. Twins can be identical, meaning they developed when a single fertilized egg split early in development, or fraternal, ...

Pregnancy is a unique experience, and there are distinct differences between twin birth and the birth of a single baby. In the womb, twins grow side by side, but their development may not always be ...

"We honestly had no clue that this kind of thing [can happen] when you have twins," Nelson said in a candid video with boyfriend Zion Foster Jesy Nelson/Instagram Jesy Nelson is giving fans a candid ...