"Not all conjoined twins are separated given the risks inherent with surgery. Abby and Brittany Hensel were born conjoined with a very low chance they would make it through infancy, but they are doing well despite the fact they are still conjoined.
But little girls Allison June and Amelia Lee Tucker were in a different situation and separation was possible in their case. They’re lucky to be here in the first place — because their doctor suggested to their mother that she consider an abortion and that separation was not likely to be successful. These girls proved that OBGYN wrong." Conjoined Twins Doing Well After Separation, Doctor Told Mom She Should Abort Them | LifeNews.com: