If the question is about biologically human life, then biological life is continuous. There isn't a beginning point, though presumably there was long long ago.
If destroying biologically human life is murder, then I commit murder whenever I nick myself while shaving.
If, on the other hand, "human life" refers to being a moral agent, then that agency slowly develops over the first few years after birth. It does not suddenly jump into existence.
If "human life" is to be taken from the way some religious conservatives behave, then human life begins at conception, and ends at birth (at which time the newborn becomes an economic burden on the taxpayer, rather than a human).
Personally, I happen to believe that the pregnant woman is a moral agent, and deserves the right to make decisions for herself.
If male legislators believe they have the responsibility to control the use of sex organs, I suggest they work on controlling the use of the penis.
Jesus was a liberal hippie