Because Moshe was a man and not a woman, Onkelos changes the metaphors in his speech to reflect that reality. In his Aramaic translation, he renders this verse, “Am I the father of this entire nation? Are they my children so that You should say to me, ‘Carry them with your strength as a nurse carries a nursing child’ to the land that You committed to their fathers?” This removes the references to conception and childbirth.