Foundations of the Virgin Birth

Genesis 3:15(ESV)
15) ​​​​​​​​I will put enmity between you and the woman, ​​​​​​​and between your offspring and her offspring; ​​​​​​​he shall bruise your head, ​​​​​​​and you shall bruise his heel." ​​​ Isaiah 7:14-16 (ESV)
14) Therefore the Lord himself will give you a sign. Behold, the virgin shall conceive and bear a son, and shall call his name Immanuel. 15) He shall eat curds and honey when he knows how to refuse the evil and choose the good. 16) For before the boy knows how to refuse the evil and choose the good, the land whose two kings you dread will be deserted.