First things first:

Get out your PDR and check the "mechanism" for the Pill. They all have three -- 1) prevent ovulation (which, as we know from all those little "surprise" babies, doesn't always work), 2) thickens the mucous plug to possibly slow sperm from reaching the egg (which, again is obviously fallable) and 3) thin the endometrium (uterine wall) to make it a hostile environment for implantation. This last mechanism is abortifacient. NO ONE knows the percentages on how often each is the mechanism responsible, but #3 is still a chemical abortion.
With the IUD, the ONLY scientifically proven mechanism is to create a "hostile" womb for implantation -- afain, an abortion.

No one said that having children was the only method by which the faith was to take root. It is just one of the two. Raising children to be Christians (which works much more than preaching to the general unconverted) and preaching to the unconverted. Why do you persist in imagining things I did not say? You are better than that, B.