Other than the Lord’s Prayer, I can think of no better prayer for the barren woman to have engraved in her heart than the collect for the fifth Sunday after Trinity. I have pledged to memorize it myself this week so that it might be quickly recalled during those moments of heartache. It beautifully refocuses our desires to that which will never disappoint us.
O God, You have prepared for those who love You good things that surpass all understanding. Pour into our hearts such love toward You that we, loving You above all things, may obtain Your promises, which exceed all that we can desire; through Jesus Christ, Your Son, our Lord, who lives and reigns with You and the Holy Spirit, one God, now and forever. Amen.