Don't know and don't really care much. If I were a woman and able to carry a fetus to term I'd probably have a strong opinion on it. But I don't.
Would you consider a fertilized egg cell as a "life"? Would that make "Plan B" pills a form of murder since they stop the fertilized ova from implanting on the wall of the uterus? It's just at that point a fertilized egg cell and nothing more.
But by your position it is exactly the same as a fully formed person.
May I ask why it is important to you that life start at conception? If it is not a religious conviction, why would you care one way or the other?