I'm not a Catholic, but I believe Jesus was born by the same method God used to leave the burial clothes and the solid rock tomb without rolling away the stone, the same technique of moving from where/when to where/when and back again that he used to appear in the locked and shuttered upper room, and the same method He used to write on Belshazzar's palace party central wall while standing in a different where/when than Belshazzar's realm.
Call it what you will, but there are clues all over the Bible pointing to the ability to move between where/whens which God created and His Holy Spirit maintains.
What is more incredible than that feat is that Mary agreed to be the Mother of Jesus without knowing she would not go through the pains of childbirth at the time she agreed! Truly, The Blessed Virgin was the handmaiden of the Lord. She did the greatest job of baby sitting ever in the History of the world! And we are the more blessed for it.
Ping!
:o)