For now it would suffice to know that "Jesus the Man" was conceived by the Holy Spirit and born by an earthly mother. By spiritual means alone, the Holy Spirit caused to appear in Mary's womb a fertilized human egg that gestated into "Jesus the Man". Mary had no sexual intercourse with a man, nor was the fertilized human egg artificially inseminated into her womb.
It was by a miracle that Mary became pregnant. Those who may find this hard to believe would be helped by recalling that life and the universe, and the biological and physical laws that govern them, were created by God; thus he has control over them, and can make them work as he pleases.
Meantime, "Jesus the Man" was born in Bethlehem of the Virgin Mary in 4 BC during the reign of Harod the Great. The three apostles, Matthew, Mark and Luke chronicled the events that led to Jesus' birth, while John revealed Jesus' divinity in the first fourteen verses in the Book of John.
Apart from the events surrounding his birth, nothing is found in the scriptures about Jesus until the age of 12, when he is found in the temple sitting among the teachers of the law, listening to them and asking them questions.
The significance of the incident in the temple was that Jesus was performing well beyond his age and experience to the amazement of his listeners, which foretold the wonders he would perform later in his life.
When asked by his mother why he stayed behind with the teachers of the law, while his family was returning home to Nazareth, Jesus answered in Luke 2:49 "Didn't you know I had to be in my Father's house?"
After the incident in the temple, we hear nothing about Jesus until he reaches the age of 30, when he begins his ministry after been baptized by John the Baptist in the Jordan River.
The absence of any record in the scriptures on Jesus' life from 1 to 11 and 13 to 30 has given fodder to his critics who argue that the record existed but was destroyed, because their presence would have shown that Jesus was a man, not God.