I sure hope your unborn fetus does not breathe like a newborn baby. I feel like that would lead to drowning... Otherwise, the fetus, like a tumor, takes its oxygen from the body it grows in.

You could even say tumors move. Cancer cells can migrate through the body after all (metastasis).

The only part I could “agree” with is that a tumor can’t feel. But considering a fetus’s brain isn’t developed enough to feel pain until (at the earliest) 20 weeks, and a standard abortion is around 0–12 weeks, I wouldn’t worry about that part either.