Di-di twins are like roommates with their own room and fridge. They each have their own placenta and amniotic sac – and ...

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 ...

What Is the First Trimester of ... and by the end of the trimester, they even have fingernails. Genitals start to grow, but it’s too early to tell by ultrasound whether you’re having a girl ...