Of course they are. Maybe not due to some outdated definition but that needs to be changed. Just because the embryo is carried inside and still bound. Heck, you wouldn't call an egg a "mother hen". And now there's stages where evolution even designed an intermediary concept - marsupials.
Science can sharply differentiate both organisms from one another, ie. DNA or biological barriers
When I was inside my mothers womb, I was already a human, and what I did was *growing* (which is evident of an autonomous will to live.)
These that cry for woman's rights completely forget that half of killed embryo's were female, too - deprived of a right to live.
I sincerely believe should be extended before birth, that is an antique view to label the formation of a human.
Though there should be exceptions like rape-cases. But this problem would be better solved by securing that rapes don't happen in the first place. The US ranks quite high and far beyond the average cases worldwide so it seems to me to a double win to prevent a rape victim's trauma and an abortion.
worldpopulationreview.com