It's the Feast of the Annunciation today and you can imagine Mary's conversation with Joseph, several months after her meeting with the angel.
"Mary, you're pregnant."
"Don't worry, the Holy Spirit did it."
What a brave young woman. She ran the risk of being stoned to death or, at the very least, being outcast from the community with no means of support. Fortunately an angel intervened again in the affairs of men, and put Joseph straight. Here's a prayer, taken from the concluding Collect of the Angelus:
WE beseech thee, O Lord, pour thy grace into our hearts; that, as we have known the incarnation of thy Son Jesus Christ by the message of an angel, so by his cross and passion we may be brought into the glory of his resurrection; through the same Jesus Christ our Lord. Amen.