I don’t care if a fetus has a heartbeat.
Or if it can hear.
Or if it can write me a letter from my uterus (LOL).
Because none of those things grant it the right to use my body against my will. We don’t have an intrinsic right to life, not one that’s more important than another person’s right to bodily autonomy. Bodily autonomy is simply the most important right we have.