From the Bible, we know that the source of life is the Holy Spirit. Paul said that in God we live, move, and have our being (Act 17: 28). Even a pagan cannot breathe without the power of the Holy Spirit. Although the Bible speaks of Christ being conceived in the womb of Mary through the power of the Holy Spirit, in a more general sense no one is conceived in the womb except by the Holy Spirit.
(Taken from Everyone’s a Theologian, p. 178)