> his opinion is that life starts when sperm and egg meet. There is some evidence that a large percentage (30-75%) of all fertilized eggs do not implant. If e

> his opinion is that life starts when sperm and egg meet. There is some evidence that a large percentage (30-75%) of all fertilized eggs do not implant. If every one of those was a human life, your friend might consider this an extremely large public health problem, and perhaps of greater significance than poverty, war, and plagues.