The ontogeny of epiphyllous microsporangia Ginkgo indicated that the microsporophyll in Ginkgo is of phyllome origin.Possibly, the epiphyllous microsporangia is a peculiar chimera.
Six days after fertilisation these were injected with human extended pluripotent stem cells, which can develop into any other cell type found in the body.
In 2017 Japanese researchers demonstrated the principle by transplanting parts of a pancreas that had grown inside a mouserat chimera into a diabetic mouse, curing it.