Over the course of twenty years, Maria Theresa gave birth to sixteen children, thirteen of whom survived infancy. The first child, Maria Elisabeth (1737–1740), was born a little less than a year after the wedding. The child's sex caused great disappointment and so would the births of Maria Anna, the eldest surviving child, and Maria Carolina (1740–1741). While fighting to preserve her inheritance, Maria Theresa gave birth to a son, Joseph, named after Saint Joseph, to whom she had repeatedly prayed for a male child during the pregnancy. Maria Theresa's favourite child, Maria Christina, was born on her 25th birthday, four days before the defeat of the Austrian army in Chotusitz. Five more children were born during the war: (the second) Maria Elisabeth, Charles, Maria Amalia, Leopold and (the second) Maria Carolina (b. &amp; d. 1748). During this period, there was no rest for Maria Theresa during pregnancies or around the births; the war and child-bearing were carried on simultaneously. Five children were born during the peace between the War of the Austrian Succession and the Seven Years' War: Maria Johanna, Maria Josepha, (the third) Maria Carolina, Ferdinand and Maria Antonia. She delivered her last child, Maximilian Francis, during the Seven Years' War, aged 39. Maria Theresa asserted that, had she not been almost always pregnant, she would have gone into battle herself.