I'm confused. Where are you getting that they tested unborn babies? Maybe you need to look up a few scientific terms.

They did not test unborn babies. They tested human bood and gut cells in test tubes or petri dishes - "in vitro" testing . You may be thinking of "in vitro" fertilization used by couples who cannot conceive a child because of the man's low sperm count or the woman's inability to produce healthy eggs, etc. The woman's egg is fertilized by the man's sperm "in vitro" - in a petri dish - then transplanted into the woman's uterus for gestation and eventual birth.

There’s no indication that the referenced work was done on embryos or fetal tissue of any kind. The stem cell model they used (RepliGut from Altis) is both advertised and sold over the internet, which would be illegal in some jurisdictions. The cells in the kit are billed as donor-derived intestinal epithelial cells, which do not come from embryos. Altis works with ethically procured donated organs.

In Vitro means in a test tube or petri dish as opposed to In Vivo which means in a living human or animal.