This work was prepared for and dedicated to Lucrezia Borgia by her physician, Bonaccioli, who guided her through 14 pregnancies, the last of which was fatal to both mother and child. The first three chapters concern female genital anatomy, sexual intercourse, fertilization, formation of the embryo, development of the fetus (and infusion of the soul). The final six chapters concern signs of pregnancy, its difficulties and their cures, causes of abortion, vaginal discharge, gestation, the mechanics of birth, midwifery, lactation, care of the newborn, dentition, etc.