@oristarA,
One would need greater understanding of the Catholic mind, something I, as a former Catholic, can only barely discern. Jesus commanded his followers to proclaim the gospel (good news) of the kingdom at Matthew 24:14; but it seems obvious he was referring to his mention of the kingdom in Matthew 6:10 and Daniel's prophecy recorded at Daniel 2:44 ( a real government). This is the only reference I know of any message to be preached on the part of Christians.
Somewhere in the history of the Catholic Church, a concept was developed claiming that any attempt to block fertilization, other than the monthly timing of intercourse was a sin as serious as murder. I can find no scriptural basis for the teaching. Of course, the Catholic Church generally values tradition above scripture.
As a former Catholic, I announce
Ite, missa est.