Situation ethics and embryo research
In some cases embryo research can be used to preserve human life (personalism) by eradicating diseases
It could be argued because embryos can't feel pain
"Love is the only means" - if there is loving intention this is acceptable
"Love is the only norm" - doctors may may use this to gain fame and fortune
Personalism - uphold human life
Pragmatism - if it has a low chance of success, the embryo should be left alone