Twins Sydney and Lexi were conjoined at birth and separated seven months later in a risky surgery, but are now thriving at age 17 Julie Mazziotta is the Senior Sports Editor at PEOPLE, covering ...

Conjoined twins Amelia and Allison Tucker have spent all eight months of their little lives inside the Children's Hospital of Philadelphia. And now, after enduring a complex, seven-hour procedure ...

Conjoined fetuses are a rare type of identical twins that share a placenta and an amniotic sac, when the embryo divides at 13-15 days from conception. The incidence ranges from 1/50,000-1/100,000 ...