Scientists have successfully created egg cells for the first time using rodent skin stem cells. The eggs are then implanted into rodent foster mothers after being fertilised.
Even though the success rate is less than 1% and producing human eggs from this technique is still years away, it provides a futuristic possibility of making human eggs in the lab from skin or other cells.
Reference: http://www.straitstimes.com/world/united-states/scientists-use-skin-cells-to-create-healthy-mice