_________________________________________________
Of Course God needed Mary even if He could have made children out of stones. Jesus needed to be the Son of Man and the Son of God, there was no other way other than Mary or some other woman.
God has already proven that He can make Man from the dust of the earth, that is how Adam came about.
The question is simple but you make reference to things I did not question. Mary is fulfillment of prophesy. Does God require Mary’s ovum too to fulfill prophesy? I do not find necessity to believe a certain part of Christendom dogma of Mary is required for Salvation. The only reason for the question is your statement God not having a feminine nature.
Gen 3:15 And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.
appears to me the ovum of Mary was necessary to fulfill prophesy.