Mono-mono twins are an incredibly rare type of identical twins who share both a placenta and an amniotic sac. While this makes for a high-risk pregnancy, advances in monitoring and treatment have ...

Identical (monozygotic) twins develop from a single egg-sperm combination that splits into two. If the split is delayed, usually a week or so after conception, the processes of growing a placenta, ...

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, ...

A mother of twins was left "shocked" after a DNA test involving her two young sons confirmed a long-held suspicion. Charlotte Hassan, 33, admits she was a "little nervous" when she first learned she ...

Jesy Nelson has broken down in tears while opening up about the ongoing “complications” she’s experienced during her pregnancy with identical twins. The former Little Mix singer, 34, who left the girl ...

Jesy Nelson is providing a medical update. Nearly two months after the Little Mix alum announced that she was expecting identical twins with Zion Foster, she shared that she's been experiencing a ...

The sisters' sons were also the same weight and height at birth. Identical twin sisters Jill Justiniani and Erin Cheplak share the same birthday, and now their newborn sons do, too. Justiniani and ...

Gabrielle Taylor’s viral TikTok on how doctors told her identical twins apart before birth has every parent of multiples relating Ashley Vega is a writer-reporter at PEOPLE. She has been working at ...