The Apostolic See is the mother and mistress of all the faithful. It goes without saying, though, it's been one tough battle.
Agitated and tossed by so many storms and tempests, so sorely distressed in that year 1968 - a time of distresses in almost all affairs - the pastoral solicitude and vigilance of Paul gave us a suitable and longed-for remedy: Humanae Vitae.
"Blessed be the God and Father of our Lord Jesus Christ, the Father of mercies and the God of all comfort." -II Cor. 1:3.
Hindrances remain and they are many. Pray and fast. And obey.