It is the Holy Spirit who says yes to the new idea and work of creation of God. It is the Holy Spirit who overshadows the x or y and enlivens these so that long before there is even a hint of conception a new creation has been knitted together by the overshadowing, which of course, means in secret and away from vision.
The theme of overshadowing or tabernacling is important because we encounter this right at the beginning of time, the beginning of all creation and throughout scriptures in cloud overshadowing Moses on Sinai, Cloud overshadowing the people of Israel as they travelled through desert, the Cloud overshadowing Jesus and Peter James and John on Tabor. And of course the overshadowing of Mary to conceive Jesus.
And this overshadowing and tabernacling in the form of a cloud or pillar of fire or quiet whisper, or hand which covers cavern on the mount in order to protect as the Lord passes by, the burning bush which bears the Lord without being consumed, is believed to be the Holy Spirit. The Shekinah. The Kabód, the Glory of Yahweh which created them male and female, at the spoken word. the mysterious genders which makes them same but very different. This makes them have a need for one another and fulfil the words of God “it is not good that the man should be alone, I will make for him a helper fit for him.” (Gen. 2:18). And to fulfil the command to be “fruitful, multiply, fill the earth” (Gen. `:28). Man without woman, and woman without man cannot fulfil this command. Each alone is barren.