What No One Taught You About Your Cycle
Watch on YouTube →"Women, you are not little men with a uterus." Only 5–10% of women actually have the "textbook" 28-day cycle — yet nearly every app, medical form, and cultural assumption is built around it. In this episode, Emma Waters walks through the four phases of the menstrual cycle and why ACOG now calls your cycle the fifth vital sign. In this episode: • Why medicine and wellness research were built on male physiology — and what that means for women • ACOG's 2015 declaration: the menstrual cycle as the fifth vital sign • The 28-day myth: why 21–35 days is the real range for a healthy cycle • Phase 1 — Menstruation: what's actually happening hormonally, and which symptoms are NOT normal • Phase 2 — The follicular phase: rising energy, peak verbal fluency, and why stress delays ovulation • Phase 3 — Ovulation: the 12–24 hour egg, the 6–7 day fertile window, and how to read cervical mucus • Phase 4 — The luteal phase: the corpus luteum, progesterone, and your most stable weeks • When period pain is a warning sign (like undiagnosed endometriosis) — not something to "grin and bear" If this is the conversation you never got in sex-ed, subscribe so you don't miss what's next. 0:00 – Why didn't anyone teach me this? 1:44 – You are not "little men with a uterus" 3:10 – Dr. Sarah Hill: your hormones and who you are 4:08 – The fifth vital sign (ACOG) 5:25 – The 28-day cycle myth 6:21 – Phase 1: Menstruation 8:12 – When period pain is a warning sign 9:52 – Phase 2: The follicular phase 12:26 – Phase 3: Ovulation and the fertile window 14:53 – Phase 4: The luteal phase 15:59 – What to do next: body literacy and finding an instructor 📌 Follow Rethinking Fertility Instagram: https://www.instagram.com/rethinkingfertility/ Facebook: https://www.facebook.com/rethinkingfertility/ X: https://x.com/rtfertility 🔗 Substack: https://rethinkingfertility.substack.com 📬 Never miss an episode — subscribe on Substack for show notes in your inbox. SHOW NOTES & SOURCES • This Is Your Brain on Birth Control — Dr. Sarah Hill, Texas Christian University → https://www.sarahehill.com/ • ACOG Committee Opinion: Menstruation in girls and adolescents — using the menstrual cycle as a vital sign (2015) → https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2015/12/menstruation-in-girls-and-adolescents-using-the-menstrual-cycle-as-a-vital-sign • Natural Womanhood → https://naturalwomanhood.org/ • Elevate: The Body Literacy Project → https://www.thebodyliteracyproject.org/ Rethinking Fertility exists to equip families with honest, evidence-based education on reproductive technology that are grounded in science and a biblical understanding of the human person. #MenstrualCycle #WomensHealth #BodyLiteracy #FertilityAwareness #CycleSyncing #HormoneHealth #FollicularPhase #LutealPhase #FifthVitalSign #RethinkingFertility