Essays, reference, and reflection on the Billings Ovulation Method and the female cycle. Written by the Corvia team.
Faith and the Feminine
A founder note on why Corvia has a Catholic prayer life inside it, and the one rule we never break.
July 29, 2026 · 3 min read
Every Season
How the Billings Ovulation Method surfaces chart patterns linked to endometriosis, and why your daily observations can become a real conversation with a physician.
July 25, 2026 · 5 min read
A 45-day cycle is not a broken cycle. How the Billings Ovulation Method reads long and irregular cycles in real time, without a calendar.
July 22, 2026 · 6 min read
A grounded guide to charting your cycle after the pill using the Billings Method. What to expect, what is normal, and how long the transition takes.
July 18, 2026 · 6 min read
A gentle first guide to your period and cycle, built on the Billings Method. Written for young women beginning something sacred.
July 15, 2026 · 6 min read
Perimenopause makes cycles irregular. The Billings Method still works, because it reads your body day by day. Here is what changes, and why.
July 12, 2026 · 6 min read
A gentle companion to charting again after pregnancy loss. What the first cycle looks like, when signs return, and how to be with a chart shaped by grief.
July 8, 2026 · 6 min read
Cycle Education
A late period almost always means ovulation came late, not that your luteal phase stretched. Here is what Billings observation shows.
July 5, 2026 · 6 min read
A dry day in the Billings Method is a specific hormonal state, not an absence of signs. Here is what your body is actually saying.
July 1, 2026 · 5 min read
Slippery sensation is the vulva's felt experience of the most fertile mucus in the cycle. Here is what it means, and why sensation matters more than appearance.
June 28, 2026 · 5 min read
The Billings Method
Both methods help women recognize fertility. The biggest difference is what they ask you to observe each day.
June 24, 2026 · 7 min read
Why you only know it after it happens, and why that matters.
June 20, 2026 · 6 min read
Before you can recognize change, you need to know what unchanged looks like.
June 17, 2026 · 8 min read
A husband's notes on what charting together actually looks like on an ordinary Tuesday. Not a testimony. Not a tutorial. The real thing.
June 13, 2026 · 7 min read
Cycle syncing sounds empowering, but it treats the female body as an optimization variable. A Catholic look at what the framing gets wrong.
June 9, 2026 · 6 min read
A word is a worldview. Here is why Corvia will not call cycle observation "tracking," and what we say instead.
June 5, 2026 · 6 min read
A calm, clinically grounded guide to charting the Billings Ovulation Method during breastfeeding. Postpartum baseline, returning fertility, and what to expect.
June 2, 2026 · 13 min read
PCOS breaks most cycle apps. Here is what the Billings Method actually offers women with irregular ovulation, and what the research says.
May 29, 2026 · 13 min read
Your cycle is not just biology. Theology of the Body teaches that the female body speaks. Here is what John Paul II said, and what it means for how you chart.
May 26, 2026 · 14 min read
What the research actually tells us about correct use, typical use, and why the numbers vary.
May 22, 2026 · 9 min read
What cervical mucus actually means, why the Billings Method treats vulvar sensation as the primary sign, and what most cycle sources leave out.
May 18, 2026 · 12 min read
The postpartum cycle is its own season. A gentle, clinically grounded guide to the return of your body's rhythm.
May 15, 2026 · 8 min read
What the Catholic Church actually teaches about natural family planning. Pastoral, grounded, not preachy.
May 11, 2026 · 8 min read
The body speaks a language. Corvia teaches you to read it. A wide-entry cornerstone on cycle literacy.
May 8, 2026 · 8 min read
A simple way to understand your cycle by learning the signs your body already gives you.
May 4, 2026 · 10 min read
