1. Aristotle (1953) De Generatione Animalium, trans. A. L. Peck, London: Heinemann.
2. Aristotle's Works: Containing the Masterpiece, Directions for Midwives, and Counsel and Advice to Child-bearing Women, with various Useful Remedies (n.d.), London: John Smith.
3. Augustine (1987) City of God, London: Penguin.
4. Bateman, Stephen (1581) The Doome Warning all men to the Judgemente: Wherein are contayned for the most parte all the straunge Prodigies hapned in the Worlde, London.
5. Blondel, James Augustus (1727) The Strength of Imagination in Pregnant Women Examined, London: J. Peele.