If you don't have birth control, you may have lots of children. This shouldn't be a big surprise. Medieval people had various concoctions/devices/rituals that purported to reduce fertility, but none of them worked real well. On the other hand, a lot of people didn't have children when they wanted them. Women who work extremely hard and are undernourished are less likely to get pregnant. And there was always the sad fact that half of all children (roughly) died before their first birthday, so having babies didn't necessarily mean having adult children.
Let's look at a few examples of well-documented royal women to see how many children they could have, starting with Eleanor of Aquitaine (d. 1204). (And note that these women had the best nutrition and medical care their time could offer.)
Eleanor was wife of two kings, Louis VII of France and Henry II of England, and mother of two more kings, Richard I and John of England, as well as two queens (by marriage), Joan of Sicily and Eleanor of Castile. But these four children were less than half of her total brood. She gave birth to ten children, all but one of whom grew to maturity. Her first, a daughter (she had two daughters and no sons with Louis VII) was born when Eleanor was twenty-one. Her youngest, John, the future king, was born when she was forty-two. Although all but the one son who died in early childhood grew up and married, she outlived all but two of her children.
(It seems like a good time to reiterate that medieval people would have been just as devastated by the loss of a child as we would be. One historian suggested that medieval people wouldn't have loved their offspring, but he clearly had no clue what he was talking about.)
Let us turn now to Blanche of Castile (d. 1252), Eleanor of Aquitaine's granddaughter (Blanche's mother, also named Eleanor, had married the king of Castile). Blanche, the wife of King Louis VIII of France (grandson of Louis VII), had twelve children. She had the first when she was seventeen, having been married when only twelve (and presumably still too young to become pregnant). She was thirty-six when she had her final child, being pregnant with him when her husband died.
Of these twelve children, the first four all died very young. The fifth, however, flourished, the future Louis IX. The other seven all lived at least into their teens, with one exception, a boy who. died at age one. (Three others of these final seven died before their mother, so she outlived all but four of her twelve offspring.)
Margaret of Provence (d. 1295), wife of Louis IX, had eleven children, nearly as many as her mother-in-law. Margaret was daughter of the count of Provence, who had married all four of his daughters to kings. Margaret married Louis when she was thirteen (he was twenty), but they did not start having children for another six years, probably because she was still very young. But once they started they didn't stop.
They had their first child, a girl who died as a toddler, when Margaret was nineteen, and their last when she was thirty-nine. Of these eleven children, all but two lived at least into their teens, the first-born girl and a boy who died not long after birth. One of Margaret's sons, named John Tristan, was born in Egypt, where Louis and Margaret were (unsuccessfully) trying to wrest Jerusalem back from the Muslims through a great Crusade. Perhaps ironically, when Louis tried Crusading again twenty years later, John Tristan accompanied his father and, like Louis, died on the campaign. Margaret (who wisely did not attempt a second trip to Egypt) lived for another twenty-five years and outlived all but three of her children.
In spite of having large broods, these women all outlived their husbands as well as the majority of their children. Eleanor of Aquitaine lived to be 80 and rode down to Spain in her 70s to pick out her granddaughter Blanche of Castile as a suitable bride for the French king. Blanche herself lived to be 64. Margaret of Provence lived to be 74. These queens were tough. They all started having children in their late teens/early twenties and packed them in at a rough average of one every two years, until they were somewhere around forty. Although they cannot be typical of medieval women in general, frequent childbirth over a twenty-year period may well have been the norm for many.
© C. Dale Brittain 2026
For more on medieval rulers, see my new ebook, Still Medieval After All These Years, available from Amazon and other major ebook platforms. Also available in paperback.



