From the womb, i.e. from the time when I came out of the womb. My mother's bowels, i.e. out of her womb; which he justly mentions as a great and wonderful, though a common and neglected, work of God's power and goodness.
Related Commentaries of Psalms 71:6
Psalms 71:6
6 By thee have I been holden up from the womb: thou art he that took me out of my mother's bowels: my praise shall be continually of thee.