I believe Scripture Teaches An "Individual" Earthing comes into "being An Individual", when "it is birthed" and severed from from it mother's blood supply via, the placenta.
I don't believe a maggot is a fly, any more than I believe a fetus is a human.
God established a development period for insects, animals and humans...and ONCE develop-ED, and born, their own Individual ALIVE Life begins.
Rather than argue, one is murdering an independent ALIVE thing, that was not born...the fact is; a dependent developing thing was prevented from developing into an independent ALIVE born thing.