Why did Mary's father not go to Bethlehem for the census?

Mary's father did not go to Bethlehem for the census because Mary's father is not mentioned in The Bible. Instead, Mary, who was pregnant with Jesus, traveled to Bethlehem with her husband Joseph, as required by the Roman census decree issued by Caesar Augustus. This journey fulfilled the prophecy that Jesus would be born in Bethlehem, as foretold in the Old Testament.