Researchers have followed a "14-day rule" for generating human embryos in the lab for many years. The International Society for Stem Cell Research suggested modifying the regulation in specific instances last year. Now, scientists have managed to create mouse embryos without sperm or eggs.
Without a mother's egg or womb or a father's sperm, scientists have developed "synthetic" mouse embryos from stem cells.
The lab-created embryos resemble a real mouse embryo up to 8 ½ weeks after fe...
