Contraception is an intrinsically disordered and selfish act. Women are not always fertile. For a period during the month, a women is infertile from anywhere to 7 to 12 days, approximately. Hence, one couple may copulate at certain periods naturally, without the artificial interference of contraception. However, even if one would correlate, one's acts of coition to the infertile cycles using NFP (Natural Family Planning), one is still open to life, as God may still bless the couple with a child. As a woman is still capable of getting pregnant, even during her seemingly infertile periods, however the chance is reduced to approximately between 1-9%, compared to approximately 60-70% during fertile periods. The main issue, is being "Open to life." When one utilises contraception against God, by frustrating the procreative faculties of one's union, one rebels and sins against God. This insurrection, is the selfish way, saying in effect to God: "
Not Thy will, but
my will be done."
Contraception is an artificial barrier and impediment to the blessings of God. No Church, prior 1930, in Christianity had ever viewed contraception as anything but evil, sinful, and contrariwise to the will of God. I should not see why one should not think the same today (relevance to modernity and the ways of the world do not matter with God; His truth stands, no matter the world's fashion).
God does not change; for His truth is immutable, why do some Protestants, some very Liberal Catholics not see this?

What is right, is right; And what is wrong, is wrong. If it was wrong prior to 1930, it is wrong, today.