Your Cycle, Charting & Hormone Hub

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