http://www.firstthings.com/article/2008/07/002-the-vindication-of-ihumanae-vitaei-28
http://www.catholic-forum.com/churches/luxver/donumsanctum/hv30years.htm
http://catholicicast.com/2010/01/06/humanae-vitae-predictions-come-true-mp3/
http://pop.org/201003231196/prophecies-of-humanae-vitae
Nowadays, women can choose from a bevy of birth-control options, including pills, patches and rings that allow them to have as few periods as they like, even none. Implants and intrauterine devices (IUDs) can prevent pregnancy for years at a time and eliminate the need to refill and remember. Morning-after pills that can decrease the risk from unprotected sex are available without a prescription even to teenagers. Women who want to end their fertility permanently can do so in a doctor's office without undergoing surgery. Abstinence is still taught in many schools and homes as being 100% effective if followed diligently.
Yet despite all these options, the rates of unplanned pregnancies remain high...
Perhaps unbridled fornication w/o the use of ariticial birth control causes unwanted pregnancies. Perhaps the introduction of artificial birth control promotes immorality. However, I cannot logically link the introduction of artificial birth control with unwanted pregnancies. Of course, religious doctrine is not always based on logic.