the ending (spoilers)
It seems Francois died getting Serge back in time for the birth of his son. I guess that was him killing himself, Christ-like in order to redeem Serge & also willing the baby to come out normal. But will that turn Serge around or is it just a short lived hope? Did Francois die or was he just slumped over in exhaustion? Left up to the viewer, I guess.
Expansion to your ego.