When Ham was under the spell of Anu and Ishtar, they had secretly experimented on him through occultic sciences that were beyond the knowledge of mankind at the time. They had altered his body by splicing their own genetic makeup into his. But they also violated his wife, Neela, impregnating her with a newly developed genetic implantation. One that would carry the recessive genes of the Watchers without resulting in immediate gigantism. They hoped this would suffuse throughout the population with more efficient results.