The bill of life states that human life may not be touched from the moment of conception until a child reaches the age of thirteen.
However, between te ages of thirteen and eighteen, a parent may choose to retroactively "abort" a child...
... on the condition that the child's life doesn't "technically" end.
The process by which a child is both terminated and yet kept alive ic called "unwinding."
Unwind by Neal Shusterman
Highly recommended. It really made me think about the issues of prolife and prochoice.