**This is a view of sex, science and history that I cannot accept. Perhaps you could provide some evidence for it. The Church has been aware of fertility and the times of it for as long as we have records for. **
We must be careful not to be too elitist in our idea of knowledge and look down upon others.
Trust me, we are not as advanced as we like to think. Many women today have no clue about their cycles or any such knowledge of their own reproductive systems, they are put on birth control and sent on their way.
Are you saying that under the leadership of God and the Holy spirit that the Church has operated in ignorance and that because of our scientific discovery of a microscopic thing, sexuality, and it’s rules should be redefined. If so, congratulations, that is what the world has done!