I don't think it's a grenade unless you are implicitly trying to mean it that life begins before birth, which ultimately is a definition game since it's actually quite hard to define life, hard enough that calling it "life" is a matter of personal worldview. I personally think it's quite reasonable to exclude pre-birth "deaths" from life expectancy, or event infant deaths sometimes, depending on what you are trying to measure.

In any case I didn't know this number and it's quite relevant to the discussion of how much we got rid of natural selection.