Studies of the Fetus in the Womb are two colored annotated sketches by Leonardo da Vinci made in around 1511.[1] The studies correctly depict the human fetus in its proper position inside a dissected uterus.[2] Da Vinci depicted the uterus with one chamber, in contrast to theories that the uterus had multiple chambers which many believed divided fetuses into separate compartments in the case of twins.[2] Da Vinci also correctly drew the uterine artery and the vascular system of the cervix and vagina.[2]