[GovernmentShrinker]

The family may soon be faced with an even tougher decision than the decision to abort would have been. As is the case with many conjoined twins, their circulatory systems and hearts aren’t working well enough to support both of them. This usually gets worse rather than better as they grow. At some point, the decision is often whether to hurry up and kill one, to have any chance of saving the other, or to sit by and watch both die, knowing that one very likely could have been saved.
http://www.canada.com/vancouversun/story.html?id=10929eb1-742c-43a3-9571-8b10f0960e1d&k=14563

[Pontiac]

At some point, the decision is often whether to hurry up and kill one, to have any chance of saving the other, or to sit by and watch both die, knowing that one very likely could have been saved.

These twins have fused brain stems, it hard to imagine how they could successfully separate these twins, even if they should sacrifice one to save the other.