St. Catherine of Sweden (lived 1331-1381)
In 1331, St. Bridget gave birth to her fourth child, Catherine. A short 14 years later, Catherine of Sweden married Eggart von Kürnen, a German nobleman. Together, the couple devoted themselves to a marriage of perpetual chastity and spent their time living out the virtues of the Gospel. But Catherine’s husband passed away shortly after and although many men courted Catherine, she dedicated the rest of her life to serving the Church.
Catherine journeyed with her mother across Europe and ministered to the poor that they encountered. Although she never experienced the pain of miscarriage herself, Catherine counseled women who had suffered a miscarriage or were experiencing complications in their pregnancy.
Source: https://aleteia.org/2018/08/20/3-women-saints-who-know-the-pain-of-miscarriage/