What are the ethical issues? Researchers can screen embryos for a wider array of conditions, but they stress there are no guarantees.

Family of two-year-old Alta Fixsler faces another legal setback.

Family of two-year-old Alta Fixsler will appeal decision; hospitals in Israel and US had offered continuing care.

Doctors say two-year-old Alta Fixsler has no chance of recovery, but removing life support goes against the family's religious beliefs.