Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Dissections showing the development of the foetus, from embryo to the latter stages of pregnancy: Nine figures, including an illustration of the placenta within the uterus, with umbilical cord attached. Coloured line engraving by W.H. Lizars, ca. 1827. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.