Studies on the fetus as either imagined by the artist from observation by caesarian section or from a corpse & the structure of the genitalia and pelvic muscles of women/a woman., Leonardo da Vinci, circa 1511

Date: circa 1511. Dimensions: height: 30.4 cm (11.9 in); width: 21.3 cm (8.3 in). Medium: black chalk and sanguine on paper. Collection: Royal Library at Windsor Castle. Leonardo da Vinci - Studies of the fetus in the womb