The angel of the LORD also said to her: "You are now with child and you will have a son. You shall name him Ishmael, for the LORD has heard of your misery. He will be a wild donkey of a man; his hand will be against everyone and everyone's hand against him, and he will live in hostility toward all his brothers." (Genesis 16:12)
Ultrasound scanning machines of this age sometimes do predict wrongly the sex of a child in the womb. Back in the good old days when there were no such machines around, heaven prophesied that Hagar, the Egyptian maidservant turned wife of Abraham would deliver a baby boy who would be called Ishmael and that when he grew up he would be a wild donkey of a man. Prophesy the sex, name and ability of the one to be born and be perfect in the outcome of all the things prophecied. Isn't that wonderful?
Hagar had received these prophecies from heaven and later God had promised Abraham to bless this son of his.
And as for Ishmael, I have heard you: I will surely bless him; I will make him fruitful and will greatly increase his numbers. He will be the father of twelve rulers, and I will make him into a great nation. (Genesis 17:20)
Yet some years later Ishmael was on the verge of death being expelled from home with his mother and in the wilderness without food and water.
Then she went off and sat down nearby, about a bowshot away, for she thought, "I cannot watch the boy die." And as she sat there nearby, she began to sob. (Genesis 21:16)
But God does not forget the promises he makes; neither does he need help from others to fulfill it. So we find an angel helping Hagar out.
God heard the boy crying, and the angel of God called to Hagar from heaven and said to her, "What is the matter, Hagar? Do not be afraid; God has heard the boy crying as he lies there. Lift the boy up and take him by the hand, for I will make him into a great nation." Then God opened her eyes and she saw a well of water. So she went and filled the skin with water and gave the boy a drink. God was with the boy as he grew up. He lived in the desert and became an archer. (Genesis 21:17-20)
Still later, the Bible gives an account of the progeny of Ishmael.
These are the names of the sons of Ishmael, listed in the order of their birth: Nebaioth the firstborn of Ishmael, Kedar, Adbeel, Mibsam, Mishma, Dumah, Massa, Hadad, Tema, Jetur, Naphish and Kedemah. These were the sons of Ishmael, and these are the names of the twelve tribal rulers according to their settlements and camps. (Genesis 25:13-16)
What God promised Hagar & Abraham, he fulfilled at the right time. He will fulfill what he has promised you too. Trust in him. God bless.