15/10/2026
Comment "Fertility" for my free guide.
Just in case no one taught you about your hormones x
Your cycle is a chain, not a set of separate events. Each step only happens because the one before it did.
That's why oestrogen matters so much. It has to reach a high enough level and hold there for around 48 hours before your brain will fire the LH surge, and no surge means no proper ovulation. No proper ovulation means no strong corpus luteum, and the corpus luteum is the only thing making meaningful progesterone in that cycle.
To check if you have ovulated a Mid-luteal cycle checks your progesterone peak (or 7 days your expected period).