A.T. Robertson Commentary 1 Corinthians 11:12

"For as the woman is of the man, so is the man also by the woman; but all things are of God." — 1 Corinthians 11:12 (ASV)

Of (εκ)

--by (δια). Ever since the first creation man has come into existence by means of (δια with genitive) the woman. The glory and dignity of motherhood. Cf. The Fine Art of Motherhood by Ella Broadus Robertson.