My knowledge of women's history in the high middle ages wouldn't be very good. However, as an Irish archaeologist, I can tell you that the chattel slavery of women in early medieval Ireland was so abundant that a female slave or cumal was treated as a unit of currency, being equivalent to 6 to 8 séoit (one of which is equal to the value of a three-year-old heifer). If I were still a student I would be able to find you more academic sources, but I've lost access to most of the journals I used to use. From what I remember, this practice did fall into decline after the arrival of Normans, though this generally attributed to a decline in economic significance rather than a shift in social conscience. If you can access J-Stor, "Lest the Lowliest Be Forgotten: Locating the Impoverished in Early Medieval Ireland" by JW Boyle will provide you with good background on this. I know it's not exactly what you were looking for, but it as an area which I am, to some extent, qualified to talk about.