to a virgin pledged to be married to a man whose name was Joseph, of the house of David. The virgin's name was Mary.
The Old Testament foretold the virgin birth.  The first prophecy of the Messiah ever given  (Genesis 3:15) identified him as "the seed of woman"; and that never meant, nor could it ever have meant, anything other than the virgin birth of Christ.  It was prophesied again in  Isaiah 7:14, a prophetic word which an apostle declared a prediction of the virgin birth  (Matthew 1:23).