Aristotle had published a treatise on embryology, On the Generation of Animals. It is far more scientific and detailed than anything Muhammad suggests, being a whole book on the topic of embryology. In section 734a, Aristotle explicitly discusses embryological development in stages.31 In section 745b, he mentions that an embryo is attached to the uterus via an umbilicus.32 Galen, a Greek scientist living about five hundred years after Aristotle and five hundred years before Muhammad, also wrote a treatment on embryology, On the Natural Faculties. Agreeing
