Some good stuff here, but this one was especially interesting to me:

> 6. Chinese researchers made mice with two genetic fathers. They took sperm from male mice and reprogrammed them into stem cells, effectively ‘rewinding’ their development. Those stem cells retained only one set of chromosomes, like normal sperm, but were then fused with a second sperm’s DNA — resulting in both XX and XY sex chromosomes. The resulting DNA was injected into an egg without a nucleus, producing embryos with two paternal genomes. Out of 164 attempts, seven mouse pups were born; they survived to adulthood but had serious health problems and were infertile.

I guess some serious research into alternatives occured before canceling the one child policy.