Care and Feeding of Princes

Since "infant formula" was not invented until the 20th century, breastfeeding was the standard way to get nourishment into a baby. If for some reason a mother could not breastfeed (death in childbirth, illness, disinterest), a wet nurse was found: a lactating woman willing to breastfeed the newborn. There might be another reason a mother could not nurse, especially if she were a high-ranking royal: the desire not to infect the breastmilk.

If you look at family trees of kings and queens, you will see many, many members in each generation. This did not necessarily spring from a deep and abiding sexual attraction between husband and wife. The greatest need of a king/queen was to produce an heir.

The need was for several heirs, in fact. Not only was there a concern about infant mortality, or a grown son dying in battle or by accident before he had a chance to inherit the throne. There was also a political desire to marry children to nobles of your own or other countries in order to create allies through family ties.

How did this need preclude breastfeeding? According to an article from the National Library of Medicine:

There was even a belief that the milk would be contaminated by sexual intercourse, which contraindicated marital relations during the period of lactation, a situation that the queens could not afford. [link]

Since a queen was "ideally" made pregnant as soon as she was able after the birth of a child, her milk was not suitable for the newborn, and so a wet nurse was employed for that vital purpose. Choosing a wet nurse was the province of the queen herself. The wet nurse was not likely to be a woman off the street, but a member of a royal family who was lactating. The wages for a royal wet nurse were very high compared to other professions available to females in the Middle Ages.

There's a lot more medieval discussion about breast milk than one might think. The philosopher and theologian Ramon Llull had advice for raising children that focused on human milk. I'll share that next time.