When does a human life begin?

<-- When Does a Child's Right to Life Begin to Matter?

Where the line is drawn about the beginning of a human life has profound implications not just from a philosophical or religious perspective but also in terms of the application of civil and criminal law.

Option 1: Life begins at fertilization

Biologists from 1,058 academic institutions around the world assessed survey items on when a human's life begins and, overall, 96% (5337 out of 5577) affirmed the fertilization view. 

Option 2: Life is a continium

"We observe the continuous nature of human life, with fertilization representing only one key step, and know that from a biologic point of view, no new life begins when fertilization is achieved. Let us be clear that “life begins at conception” is a religious, not a scientific, concept." Richard J. Paulson

Base question: When Does a Child's Right to Life Begin to Matter?