Mary was only blessed above all other women as God chose her as a vessel to that which Christ was born through. It's like all of us that allow the light of Christ shine through us and work through us as His vessel that brings honor to His name. I believe through the faith that is Christ that God brought him into this world through that of a virgin vessel for the purpose of teaching us the grace of God to help all of us reconcile ourselves back to the Father by His unmerited grace and then was crucified, dead and buried and then on the third day God raised Him from the dead and was witnessed of many people that he was alive then God took him up to sit at His right hand to be our mediator before the Father thus sending down that very Spirit of God once again in the form of Gods Spirit (Holy Spirit) that will teach us all truths of Gods spoken word.
Luke 1:
34 Then said Mary unto the angel, How shall this be, seeing I know not a man?
35 And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.
Mark 3:
31 There came then his brethren and his mother, and, standing without, sent unto him, calling him.
32 And the multitude sat about him, and they said unto him, Behold, thy mother and thy brethren without seek for thee.
33 And he answered them, saying, Who is my mother, or my brethren?
34 And he looked round about on them which sat about him, and said, Behold my mother and my brethren!
35 For whosoever shall do the will of God, the same is my brother, and my sister, and mother.
Mary was in Gods will to be used of God to bring forth the Christ child as being a pure undefiled vessel by which the Holy Spirit overshadowed her causing her to become impregnated not by natural intercourse, but by the supernatural of God creating life in her. She was blessed more than the other women in that place and soon delivered the Christ child being His earthly mother who bore him and raised him until the time he left his earthly mother to start out on his ministry. Mary was Jesus mother not by the natural, but by the supernatural of God, and only a vessel used of God to bring His word to earth in flesh form of a man. God is Spirit without no form, but it is God manifested in different forms for us to hear Him speak to us. IE: burning bush, jaw bone of an ass, Jesus in the form of man. Jesus being before creation was with God and was God, but it was Gods form of himself that was saved for an appointed purpose in Gods timing.