2. https://www.ucsf.edu/news/2011/02/9366/ucsf-surgeon-reflects-performing-worlds-first-fetal-surgery-30-years-ago, accessed 21 June 2018.

3. https://surgicalinnovations.ucsf.edu/spotlight/ innovator-profiles/michael-harrison, – md.aspx, accessed 21 June 2018.

4. https://www.ucsf.edu/news/2011/02/9366/ucsf-surgeon-reflects-performing-worlds-first-fetal-surgery-30-years-ago, accessed 21 June 2018.

5. Michael Harrison interview, The First Foetal Surgery, BBC World Service, 10 May 2018.

6. Michael Harrison, ‘Historical Perspective’, in M Harrison et al. (eds), The Unborn Patient: The Art and Science of Fetal Therapy, Saunders, 2001.

7. Author interview Charles Rodeck, 2017.

8. Harrison, Atlas of Fetal Surgery, p 12.

9. https://surgicalinnovations.ucsf.edu/spotlight/innovator-profiles/michael-harrison, – md.aspx, accessed 21 June 2018.

10. Harrison, ‘Historical Perspective’.

11. Twice Born: Stories from the Special Delivery Unit, PBS documentary, 2015.

12. Harrison interview, The First Foetal Surgery.

13. Author interview Lori Howell, 2018.

14. Author interview Greg Heuer, 2018.

15. Author interview Scott Adzick, 2018.