22. Campbell, ‘Early Sonographic Prenatal Diagnosis’.

23. Donald et al., ‘Investigation of Abdominal Masses’, 1191.

24. Author interview Stuart Campbell, 2017.

25. Author interview Stuart Campbell, 2017.

26. Campbell, ‘A Short History of Sonography in Obstetrics and Gynaecology’.

27. Author interview Stuart Campbell, 2017.

28. S Campbell, FD Johnstone, EM Holt, P May, ‘Anencephaly: Early Ultrasonic Diagnosis and Active Management’, Lancet, 9 December 1972.

29. Chamberlain, From Witchcraft to Wisdom, p 225.

30. Author interview Stuart Campbell, 2017.

31. Campbell et al., ‘Anencephaly’.

32. Campbell et al., ‘Anencephaly’.

33. Author interview Stuart Campbell, 2017.

34. http://www.sites.hps.cam.ac.uk/visibleembryos/s7_4.html, accessed 14 June 2017 and Newman, Fetal Positions, pp10–11.

35. https://en.wikipedia.org/wiki/Lennart_Nilsson, accessed 14 June 2017.

36. Newman, Fetal Positions, p 25.

37. Monica J Casper, The Making of the Unborn Patient: A Social Anatomy of Fetal Surgery, Rutgers University Press, 1998, p 66.