I have often wondered if it’s more of a symbiotic relationship rather than a parasitic one because in fairness, the foetus doesn’t kill the host.

Having said that, symbiosis only occurs with two distinctly different species.

With pregnancy and the human fetus, it’s is a kind of quasi-parasitic relationship because the host survives the parasite. Even though it’s changed. (Pregnancy changes body chemistry and functionally not just physical change)