Catechism of the Catholic Church §498 — excerpt
People are sometimes troubled by the silence of St. Mark's Gospel and the New Testament Epistles about Jesus' virginal conception. Some might wonder if we were merely dealing with legends or theological constructs not claiming to be history.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.
Also cites: St. Justin, Dial. 99, 7: PG 6, 708-709 · Origen, Contra Celsum 1, 32, 69: PG 11, 720-721 · al · Dei Filius 4: DS 3016