The Old Testament says Adam was made in the image of God,and the New says Adam was made in the image of Christ.The image of God is the image of Christ.God had the plan to come in the future in flesh,before He created Adam,and created Adam in that image,which is an innocent nature,in flesh.
When Adam sinned he fell out of the image of God,but in the New Testament,led by the Spirit,we can be back in the image of God.Nobody in the Old Testament was in the image of God,until Jesus came,and the people that follow Him,by the Spirit.
You could say we are born in the image of God,because babies are innocent,which the Bible says the angels always do behold the face of the Father for the little ones.It is not until later on when we sin,which we will do for we are born not knowing God,that we are not in the image of God,which would mean we are not born in the image of God,for we will not portray his ways,and attributes,later in life,until we come to Him.