Your Cycle, Charting & Hormone Hub

TL;DR: Fertility charting does not pinpoint the exact day of ovulation. Instead, it identifies a fertile window and confirms when ovulation has occurred, which is far more useful for both trying to conceive and avoiding pregnancy. A common misconception about fertility charting is that it should tell you the exact day ovulation occurred. In reality, charting is not designed to pinpoint a single ovulation day. Instead, it helps identify a fertile window and confirm that ovulat

If you’ve ever been told to get If you’ve ever been told to get a day 21 progesterone test, you’re not alone. It’s one of the most common ways doctors check if you’re ovulating, but here’s the thing: it’s often completely mistimed. Progesterone is the hormone produced after  ovulation by the corpus luteum. A level of 5ng/ml or higher typically confirms that ovulation has occurred. But here’s where things get tricky… Day 21 assumes ovulation happens on day 14 This test is bas