Some of the statistics above require looking at a little more closely.

With regard to the application to infertility alone, NaPro Technology has a success rate of 76% in assisting couples to achieve pregnancy - remarkably superior to the 10-15% success rate of in vitro fertilization, and without the enormous financial cost and adverse emotional and other psychological effects of in vitro fertilization.
If a treatment is very cheap, recommended by the RCC and free of ``adverse emotional and other psychological effects,'' then it's going to become routine. It's going to be used by many women to increase their chances of having children. Often, it's used from the first time a woman tries to get pregnant.

If a treatment is very expensive, condemned by the RCC and prone to ``adverse emotional and other psychological effects'' (I've never heard of any such effects except those produced as a side effect of the RCC's propaganda, but we'll accept it for now) then it's only going to be tried after most other alternative have failed.

Comparing the success chances of one against the other without correcting for this bias is meaningless unless you're generating propaganda. Which, of course, the RCC is, because it believes it's fighting a war against evil.