Yaakov, the Noaahide Laws are Seven and their derivatives, not just abortion and homosexuality. What about adultery, idolatry, ever min hachai.........
And regarding abortion, only if the Mother's life is in danger. In no way for anyother reason, incest does not produce mamzerin among Gentiles, and being a Mamzer does not carry the death penalty, let alone infanticide. A child cannot be executed!!!!!