According to Homeric Hymn II to Delian Apollo, Hera detained Eileithyia to prevent Leto from going into labor with Artemis and Apollo, since the father was Zeus. The other goddesses present at the birthing on Delos sent Iris to bring her. As she stepped upon the island, the divine birth began. In the myth of the birth of Heracles, it is Hera herself who sits at the door, delaying the birth of Heracles until her protégé, Eurystheus, had been born first.Homer, Iliad 19.95ff.
According to Homeric Hymn II to Delian Apollo Hera detained Eileithyia to prevent Leto from going into labor with Artemis and Apollo since the father was Zeus The other goddesses present at the birthing on Delos sent Iris to bring her As she stepped upon the island the divine birth began In the myth of the birth of Heracles it is Hera herself who sits at the door delaying the birth of Heracles until her protégé Eurystheus had been born firstHomer Iliad 1995ff