Ding! Give the lady a cigar. There have already been specific organ growth projects. They're problematic - but that's largely because they've got almost no funding and no viability because they're so heavily restricted by legislation in what they can and can't do - and what they can and can't be purposed for commercially once made viable. The idea that we need to breed an army of children so we can harvest them (and presumably use any of the remains that aren't re-purposed for making soylent green) - is straight out of fiction, written before anyone had any understanding of the realities of cloning technology. As an aside - in the hypothetical circumstance that we could build a bunch of womb tanks, grow kids to biological age as required for donor purposes and then harvest them? Assuming that they're born brain dead (which isn't exactly challenging in an environment where womb tanks and grow on demand clones are a commercial viability) - I'd be 100% ok with it. I'm hanging out for the day that I can jump onto amazon.com - order a 25 year old clone of myself with 12% body fat, significant muscle density, a full luxurious head of hair, great teeth, fantastic vision, artificial blood with a programmatically updatable immune system and a vastly superior oxygen carry capability, and the ability to grow a mustache that doesn't look like a pedophile - and download my brain into that sucker and recycle the body that I currently inhabit. All shit that is within 15 years (arguably, at the outside) of being technically viable. A lack of education and a general fear of change in voters delaying the availability of that sort of technology, I expect will ultimately kill more people then cancer.