Sure, we know that humans expect small pieces of human to be treated as irrelevant (e.g. you leave tiny skin particles and hairs basically everywhere and all you usually ask is that people vacuum them up to avoid the place being covered in dust) and that larger pieces (e.g. a toe, or in this case an embryo) should be treated with extra care and consideration of people's emotional reaction.

But it's not kidnapping if you keep someone's toenail clippings. It's creepy, but it's not kidnapping. It's not murder when the barber sweeps all the hair into a furnace, it's called tidying up.