Actually Mormons believe Mary became pregnant through the power of the Holy Ghost, or the spirit. We believe the Bible, that Jesus is the Only Begotten Son of the Father. Jesus' body is the result of God the Father and Mary, but it happened through the power of the Holy Ghost. We also believe that the spirits of all people originated from God the Father, so we are all spiritually his sons and daughters. That doesn't bring us any where near to the status of Jesus Christ.