This is how the process took place:
- Scientists used a process of inducing the protein BMP4 into embryonic stem cells. This protein is known to play an active role in the creation of germ cells.
- Epiblast cells were produced with the help of growth factors, embryonic cells and the BMP4 protein.
- These early embryo cells or epiblasts were developed into primordial germ cells.
- The primordial cells were injected into the testes of sterile mice.
Sure, there is a long way to go before it could find its way into the human race. However, the whys, hows, ifs and buts, are issues that loom large.