This is incorrect. Even if the fetus is a person, it has a right to individual liberty. It doesn’t have a right to another person’s body. If it can’t survive without someone else’s organs it’s right to survival doesn’t out weigh the hosts right to bodily autonomy.
An easy comparison is organ donation. We don’t require organ donation from corpses (much less demand organs from living people who have a ‘spare’) even though a lack of available organs does limit the life/liberty of people who need them. The uterus is no different than a kidney. You don’t have the right to demand to use someone else’s organs even if your life depends on them.