“Look!” The Greek word is idou (#2400 ἰδού), and it is used to get our attention. See commentary on Matthew 1:20 (“Look!).
“conceive in your womb.” The translation is correct, even though the Greek phrase sullēmpsē en gastri (συλλήμψῃ ἐν γαστρὶ) can also be understood as an idiom and translated “become pregnant in your womb.” Genuine conception did occur in Mary. We know from many verses of Scripture that Mary had to contribute the egg and God fertilized the egg. There is no indication in Scripture that when Jesus was said to be of the line of David, that that just meant he was adopted into that line. To fulfill the propheices he had to be born as a true descendant of David. Mary was not a surrogate mother, she was a real mother who made a real genetic contribution to Jesus Christ.
The prophecies were that Jesus was going to be a true lineal descendant of David. He was known as the “Son of David,” a title he recognized of himself, because he was a true descendant of David. Also, Psalm 132:11 says, “Yahweh swore an oath to David, a sure oath he will not revoke: “One of the fruit of your body I will place on your throne.” To fulfill that prophecy Jesus Christ had to be a genuine descendant of David, and he was not David’s descendant if he was God. Jesus Christ is the Son of his father, God, and his mother, Mary. Romans 1:3 is one of the many New Testament verses that speaks of Jesus being of the line of David. Most commentators ignore this clear truth in the Bible in order to maintain the tradition of the Trinity.