Three Old Testament Prophecies
There's three Old Testament prophecies concerning the birth of Christ.
1 Isaiah 7:14 Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel. ~ This prophecy gives us the means of the Messiah's entrance into this world. It would be a virgin birth.
2 Isaiah 9:6 For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace. ~ This prophecy gives us the names of the Messiah.
3 Micah 5:2 But thou, Bethlehem Ephratah, though thou be little among the thousands of Judah, yet out of thee shall he come forth unto me that is to be ruler in Israel; whose goings forth have been from of old, from everlasting. ~ This prophecy gives us the location of the Messiah's birth. It's in Bethlehem.