Heartbreaking predicament of the conjoined twins with a shared heart who can't be split and their devout Palestinian mother refused to abort .

She said she was treated well in Israel, but she decided to return home to be closer to her four other children.

Roughly one out of every 200,000 live births worldwide results in conjoined twins, according to the University of Maryland Medical Center.

Most are stillborn. About three-quarters of conjoined twins are female and are joined at least partially in the chest, sharing organs. 

Sleep time: Though their mother said she was treated well in Israel, she decided to return home with her twins to be closer to her four other children