Experts take the cell nucleus of one human egg cell whose mitochondria have a defect and place it in an egg cell with «healthy» mitochondria. (sciencedaily.com)
Most countries do not allow scientists to modify human egg cells. (sciencedaily.com)
A fertilized human egg cell does not contain a homunculus, but neither is it a structureless drop of viscous liquid. (religion-online.org)