Below is an account of the birth of Jesus from the account of Matthew, Luke, and John. Let them tell the story for they expresses it the bests.
 
Mary was a virgin engaged to a man whose name was Joseph, of the descendants of David.  And coming in, he said to her, “Greetings, favored one! The Lord is with you.” But she was very perplexed at this statement, and kept pondering what kind of salutation this was.  The angel said to her, “Do not be afraid, Mary; for you have found favor with God.  And behold, you will conceive in your womb and bear a son, and you shall name Him Jesus.  He will be great and will be called the Son of the Most High; and the Lord God will give Him the throne of His father David;  and He will reign over the house of Jacob forever, and His kingdom will have no end.”
She was found to be with child by the Holy Spirit. And Joseph her husband, being a righteous man and not wanting to disgrace her, planned to send her away secretly. But when he had considered this, behold, an angel of the Lord appeared to him in a dream, saying, “Joseph, son of David, do not be afraid to take Mary as your wife; for the Child who has been conceived in her is of the Holy Spirit. She will bear a Son; and you shall call His name Jesus, for He will save His people from their sins.”
Now in those days a decree went out from Caesar Augustus, that a census be taken of all the inhabited earth. This was the first census taken while Quirinius was governor of Syria.  And everyone was on his way to register for the census, each to his own city.Joseph also went up from Galilee, from the city of Nazareth, to Judea, to the city of David which is called Bethlehem, because he was of the house and family of David, in order to register along with Mary, who was engaged to him, and was with child. And she gave birth to her firstborn son; and she wrapped Him in cloths, and laid Him in a manger, in {a cave in feeding trough] because there was no room for them in the inn. Now after Jesus was born in Bethlehem of Judea. And the Word {Jesus) became flesh, and dwelt among us, and we saw His glory, glory as of the only begotten from the Father, full of grace and truth.
Simeon; and this man was righteous and devout, looking for the consolation of Israel; and the Holy Spirit was upon him.  And it had been revealed to him by the Holy Spirit that he would not see death before he had seen the Lord’s Christ.
And Simeon blessed them and said to Mary His mother, “Behold, this Child is appointed for the fall and [m]rise of many in Israel, and for a sign to be opposed— and a sword will pierce even your own soul—to the end that thoughts from many hearts may be revealed.”
A prophetess, Anna the daughter of Phanuel, of the tribe of Asher. She was advanced in years and had lived with her husband seven years after her marriage,  and then as a widow to the age of eighty-four. She never left the temple, serving night and day with fastings and prayers. At that very [moment she came up and began giving thanks to God, and continued to speak of Him to all those who were looking for the redemption of Jerusalem.
But Mary treasured all these things, pondering them in her heart.