A conference, organised by Oxford International Biomedical Centre (OIBC), will highlight a call by stem cell research scientists to speed up further tests on human embryos.
Leading British doctors and academics will tell the Oxford conference that opportunities created by the new Human Fertilisation and Embryology Act must be acted upon quickly.
Controversial scientific experimentation has been given a recent boost by President Obama, who has relaxed federal restrictions on embryonic stem cell research.
Among the speakers at the conference will be UCL's Prof Martin Birchall, who cultivated the stem cells used in the first-ever successful tracheal transplant.
In his speech, Birchall will warn that the opportunities created by the transplant are being squandered.
He said: 'We hope we will encourage others to be more permissive of making the leap from laboratory to patients in the field of tissue engineering.
'Although our tracheal transplant patient is completely healthy eight months post-operatively, enthusiasm has to be curbed slightly by the need for more patients and more time in follow-up.
'The recent discovery that unregulated stem cell treatments in Russia are causing tumours reminds us of this.
'However, this fear of uncertainty must not stop us from trying and must not stop clinical trials.' For this event, the OIBC has teamed up with Oxford University's Department of Continuing Education and with St Edward's School, the venue for the conference.
The conference has been organised as part of the OIBC's efforts to promote the understanding of stem-cell research and regenerative medicine.
Other contributors include Baroness Ruth Deech, who will be addressing top academics with a speech on embryonic stem cell research in the 2nd Dame Anne McLaren Memorial Lecture.
