Much of these maternal deaths were due to puerperal fever, then known as childbed fever. This became known as puerperal or postpartum psychosis. Lighter cases of puerperal mastitis are often called breast engorgement. The most frequent benign conditions are puerperal mastitis, fibrocystic breast changes and mastalgia. However, the queen died of puerperal sepsis ten days later. About three die from puerperal sepsis for every 100,000 births. Nonpuerperal breast abscesses have a higher rate of recurrence compared to puerperal breast abscesses. With puerperal sepsis, 14 out of 14 patients recovered. Wollstonecraft died of puerperal fever shortly after Mary was born. She died of puerperal fever in 1906. Semmelweis was puzzled that puerperal fever was rare among women giving street births. Shortly after giving birth his wife died of puerperal fever. Princess Marie died in 1888 from the effects of puerperal fever. His wife died in 1921 of puerperal fever. Maria died shortly after giving birth to Isabella II in 1212, possibly by puerperal fever.