If a stranger did to a woman what a baby does, it would be considered a horribly intrusive crime akin to kidnapping, slavery, rape, battery, maiming, and theft of service.
... what a baby does (to a woman)!
What does a baby do to a pregnant woman?
The answer is ... NOTHING! The woman's body does it all ... in response to the baby's presence.
It is, quite simply, the difference between having someone coming into your home and helping themselves to your comforts, conveniences, and provisions and an invited guest coming into your home, who, in response to their presence, YOU SERVE with your comforts, conveniences, and provisions.
The baby TAKES NOTHING! The mother's body, of it's OWN VOLITION, GIVES whatever is needed for the baby's comfort, nourishment, shelter, and development. Her body does exactly what it has been designed to do.
An aids vector TAKES NOTHING! The infected persons cells do exactly what they were designed to do when utilized by the AID's virus. The infected person's reticulum does exactly what it was designed to do of it's OWN VOLITION.
It is not when a woman's body does something that a moral crime is committed; it is when someone tries to interfere by force of arms under the color of law with a woman's attempt to do something about the behavior of her body that her rights are denied, and if the law is wrong, that is the tort violation of her rights against which she should have been defended. You do not address the issue with this line of argument, popular as it is. Your case, whether you wish to acknowledge it or not, rests on your Sacred knowledge that the fetus is a citizen with full rights. Lacking anything further, Sacred knowledge will not hold up in moral court.