The Collaborative International Dictionary of English v.0.48:

Church \Church\, v. t. [imp. & p. p. Churched; p. pr. & vb. n.
   Churching.]
   To bless according to a prescribed form, or to unite with in
   publicly returning thanks in church, as after deliverance
   from the dangers of childbirth; as, the churching of women.
   [1913 Webster]