Ask a couple struggling to conceive what they would want most in life and "a child" is the obvious answer. They want something money can't buy, even with all the money in the world. For a couple needing egg or sperm donation this reality might change. Money could buy at least the chance of a child if donors were to be paid, if that's one of the outcomes of the Human Fertilisation and Embryology Authority (HFEA) donation review. Various issues are being reviewed in the HFEA public consultation, but payment of egg and sperm donors is high on the agenda.