Catechism of the Catholic Church §717 — excerpt
"There was a man sent from God, whose name was John." John was "filled with the Holy Spirit even from his mother's womb" by Christ himself, whom the Virgin Mary had just conceived by the Holy Spirit.
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.