Why don't they leave it up to God to change her mind?<quoted text>
This is a tough one. It is true that a fertilized egg that doesn't implant will not survive. There are groups who try to adopt those fertilized eggs. They are called 'snowflake' babies. I think the people praying outside the abortion clinics hope they will influence even one mother to choose to not kill her baby. Sometimes a woman or girl who's heart really isn't into the abortion will see people who care and can offer help and change her mind.
It's his will they think they're trying to do, yet they don't trust him enough to let him do it.