I agree with clockwork; although it might extend a few weeks more depending on nervous system development. An embryo is not a person, and a zygote is definitely not a person, but after ~5 months the line gets fuzzy and it is of the well being of society to care for their fellow people.
Although the 10 year prison sentence is just draconian. I think this could be compared to the duty to rescue law, but I'm not sure what the punishment for that is.