I have a case study for a class I am taking. The case is about Siamese twin girls joined at the abdomen and with a fused spine. Doctors soon determined that unless the twins were surgically separated both would die. Mary, the weaker twin, whose brain was underdeveloped, would never be able to survive separated from Jodie. Jodie, who was strong and alert, had an 80-90% chance of dying if surgery was not performed. She had a good chance of surviving in the event of surgery, although, in all likelihood she would be severely handicapped and need medical attention throughout her life. In similar cases in the past, the surviving twin has sometimes died within six months of surgery (a real case from UK in 2000)
I am looking for suggestions on where to research church teaching regarding choosing possibly life for one or possibly death for both. Both in scripture and in other documents of the church.
Any guidance is very much appreciated.