Why?
Sex is not a natural human desire/function?
While not wanting to get into all the sexual acts that are not natural, intercourse between a married man and woman would be the natural course,
More than likely, your entire argument rest upon the moral censure of women for daring to engage in (natural) sexual intercourse while subsequently getting pregnant.
In the moral world, any unmarried woman engaging in sexual intercourse = SLUT.
That's from God (the authority of my moral standard).
Who do you get your moral standard from?
What's the point of this quibbling?
To show how utterly weak your defense of murdering babies is.
It's more than likely you willfully ignoring/dodging the principle at stake:
Which is that there is a living child in a woman's womb. A living and growing child that has committed no offense whatsoever, but was the natural result of intercourse that (except in the case of rape) was agreed upon by the woman.
Her pregnancy is unwanted;
"
Got a living child that is unwanted? Just murder it."
Can't get much lower than that.
by way of her pregnancy she has an unwanted intrusion upon her body.
Let's not skip over that the woman knowingly accepted engaging in sexual intercourse that is the number one cause of babies.
The baby did nothing to cause it.
So let's let the lady off scott free (who knew the consequences of her actions, but readily accepted that risk, and went full steam ahead), and let's give the kid the death sentence (who neither caused it or knew the consequence).
Just how deranged does one need to get in order to think that is justice?
Only if their very lives are mortally contingent upon continued residency/squatting.
Sexual intercourse between a man and woman is practically an invitation for a baby, as it is the number cause of babies.
"Uninvited guest" is way off.
That baby is there because of her actions, not the actions of the baby.