Progesterone, Stress & the “Progesterone Steal” Explained

About this episode

In this episode of our progesterone series (Episode 5), Dr. Brendan McCarthy — Chief Medical Officer of Protea Medical Center in Tempe, Arizona — breaks down the often-misunderstood relationship between stress, ovulation, progesterone, and cortisol. We explore the concept commonly referred to as the “progesterone steal” and why this term can be misleading. Rather than hormones being “stolen,” Dr. McCarthy explains how the body intelligently reroutes hormone production under stress to prioritize survival over reproduction. This episode covers: Why the body must feel safe to ovulate and produce progesterone How chronic stress impacts PMS, fertility, and cycle regularity The truth about cortisol (and why it isn’t the villain it’s often made out to be) Why low progesterone is not a personal failure or flaw Why you can’t medicate someone out of stress — and what good medicine actually looks like This conversation is about biology, not blame. Your body is not broken — it’s responding exactly as designed. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it.