Two diagrams of a childs head starting to emerge from the vagina; two cross-sections of an exposed uterus and two diagrams of a single child and twins in the womb. Engraving by W. Taylor, 1791, after F. Birnie after W. Smellie.

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Two diagrams of a childs head starting to emerge from the vagina; two cross-sections of an exposed uterus and two diagrams of a single child and twins in the womb. Engraving by W. Taylor, 1791, after F. Birnie after W. Smellie. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.