A metro couple is facing uncertainty after they found out their pregnancy is an extremely rare form of twins called mono chorionic monoamniotic twins. OU Health says Oklahoma hasn't seen a case of ...

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 ...

Conjoined twins—the rare identical twins who fail to separate completely--represent a form of human life that should be respected. There are many variations on typical human development of which we ...