If Mary gave birth to Jesus, then it would be impossible for Mary to remain a virgin. To pretend otherwise is to say that Jesus was created directly by non-physical means, or that Mary is not human. It reminds me of the Greek and Roman myths about their gods.
It is impossible for a "Man " to be crucified and raise from the dead.
It is impossible for Lazarus to come back life, or the daughter of the official. It was impossible for Jesus to cure the paralytic.
If you look closely at the Bible you will see many "impossible things that occurred and are recorded.