If you've been trying to conceive for a while, you've probably been given a lot of advice, and very little explanation. You've been told what to take and what to track, but rarely why, and rarely on what timescale. This page is the explanation. Once you understand how your body actually prepares for pregnancy, the 90-day method stops sounding like marketing and starts sounding like common sense.
It's also why so many women feel stuck for months or years: not because their body is failing, but because they've been working against its natural timeline without realising it.