このアポローンとアルテミスの誕生に関する記述は、ヘシオドスが『神統記』でゼウスとヘーラーの結婚前に双子が生まれていることから、矛盾しているとされている<ref>Theogony, Hesiod, Line 918</ref>。
===Io and Argusイーオーとアルガス ===[[Image:Figino.jpg|thumb|upright|left|''[[Io (mythology)|Io]] with [[Zeus]]'' by [[Giovanni Ambrogio Figino]], 1599]]
The myth of Io has many forms and embellishments. Generally, Io was a priestess of Hera at the [[Heraion of Argos]]. Zeus lusted after her and either Hera turned Io into a heifer to hide her from Zeus, or Zeus did so to hide her from Hera but was discovered. Hera had Io tethered to an olive-tree and set [[Argus Panoptes]] ({{lit|all-seeing}}) to watch over her, but Zeus sent Hermes to kill him.<ref name="OCD_Io">{{cite book |last1=Dowden |first1=Ken |editor1-last=Hornblower & Spawforth |title=The Oxford Classical Dictionary |date=1996 |publisher=Oxford University Press |location=Oxford |isbn=019866172X |pages=762–763 |edition=Third |chapter=Io}}</ref> Infuriated, Hera then sent a gadfly (Greek {{lang|grc|oistros}}, compare [[Estrus cycle|oestrus]]) to pursue and constantly sting Io, who fled into Asia and eventually reached Egypt. There Zeus restored her to human form and she gave birth to his son [[Epaphus]].<ref name="OCD_Io" />