The Virgin birth of Jesus was an almost universally held belief among Christians from the 2nd until the 19th century. It is included in the two most widely used Christian creeds, which state that Jesus "was incarnate of the Holy Spirit and the Virgin Mary" (the Nicene Creed in what is now its familiar form) and the Apostles' Creed. The Gospel of Matthew describes Mary as a virgin who fulfilled the prophecy of Isaiah 7:14, mistranslating the Hebrew word alma ("young woman") in Isaiah 7:14 as "virgin", though.[citation needed] The authors of the Gospels of Matthew and Luke consider Jesus' conception not the result of intercourse and assert that Mary had "no relations with man" before Jesus' birth.[Mt 1:18] [Mt 1:25] [Lk 1:34] This alludes to the belief that Mary conceived Jesus through the action of God the Holy Spirit, and not through intercourse with Joseph or anyone else.

Which Gospel says that Mary fulfilled the prophecy of Isaiah?