But no matter their appearance, one thing’s for sure: Fraternal twins can run in families, so your twins’ chances of having multiples of their own may be higher than average. Conjoined twins ...

And that made them happy." Because of medical complications associated with conjoined twins, the sisters would probably have not lived a normal life span if they had remained conjoined ...

(CNN) --The deaths of two conjoined Iranian twins following unprecedented surgery to separate them has prompted an outpouring of grief around the world. Ladan Bijani died when her blood ...

Their remarkable journey began when Liliya discovered she was carrying conjoined twins at her 11-week scan. Doctors couldn’t say if separation would ever be possible. “Running from one ...

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 ...

Ronnie and Donnie Galyon set the world record for oldest-living conjoined twins in 2014, after they turned 63 Rachel DeSantis is a senior writer on the music team at PEOPLE. She has been working ...

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 ...