Conjoined twins occur once every 200,000 live births (Ive read different  numbers, as high as 400,000, but this seems to the the most used number)
Approximately 40 to 60 percent of conjoined twins arrive stillborn, and  about 35 percent survive only one day.  The overall survival rate of conjoined  twins is somewhere between 5 percent and 25 percent
Conjoined twins are genetically identical, and are, therefore, always the  same sex.  They develop from the same fertilized egg, and they share the same  amniotic cavity and placenta
Are more often female than male, at a ratio of 3:1
 Those are some of the facts about conjoined twins.  We were blessed with 2  days with our precious girls.  To me, they are not only our little blessings but  also our little miracles.