John 1:14 says, “The Word became flesh and dwelt among us, and we have seen His glory, glory as of the only Son from the Father, full of grace and truth.” Christ did not become flesh as a newborn, He became flesh as a zygote. He then developed into an embryo, fetus, infant, toddler, teenager, adult, and so on. God became man by starting where we all start our human journey. He did not enter the world in the manger, He entered the world through the womb of Mary.