The internet turned your fertility into a circus of ice baths and testicle tanning. This is the version that's actually true — and worth buying into.
The data-driven practice of optimising sperm and egg quality through evidence-based lifestyle change — measured over the ~90-day window in which sperm regenerate and eggs finish maturing. Done properly, you act only on what the science supports.
Your reproductive health is the clearest read you'll ever get on your body. Sperm and eggs are biological time capsules — a signal of how well the rest of you is running. The good news: over ninety days, a lot of that signal is yours to move.
Medicine spent decades treating male fertility as an afterthought. The internet rushed into the gap — with garlic protocols and heat lamps. Millions are searching for answers no one credible is giving them.
The instinct behind the trend is right: fertility is measurable and partly in your control. What's missing is someone willing to separate the real levers from the theatre — and stand behind it.
We grade every recommendation against the evidence. Solid, emerging, or noise. No promises of a baby, no miracle powders. The credible version — for people who take this seriously.
Three facts that explain why this moment is real — and why the ninety-day window is the most encouraging idea in the whole field.
days. One full sperm-production cycle. Change the inputs now and the difference shows up in months — a clean feedback loop almost nothing else in health gives you.
Spermatogenesis ≈ 74 days + maturationIn 78,000+ men followed up to 50 years, the highest sperm counts outlived the lowest. An association, not a promise — but a signal worth watching.
Priskorn et al., Human Reproduction, 2025The reported fall in Western sperm counts since the 1970s. Real in the data, genuinely debated in meaning — which is exactly why you measure your own instead of panicking at a headline.
Levine / Swan, Hum. Reprod. Update (contested)The inside track on fertility-maxxing, for the price of two coffees a month. The moment you join, you get the Top 10 Fertility-Maxxing Protocol — the ten things that actually move the needle, graded and sourced. Then a new evidence drop lands every month, so you're always ahead of the feed.
Cancel anytime. Locked at the founding rate for as long as you stay.
When the Top 10 isn't enough, this is the whole thing: the complete 90-day, week-by-week plan for both of you. Nine chapters, every recommendation graded, every claim sourced — his tests and hers, the levers, the exposure sweep, the timing, and when to stop optimising and see a doctor.
The whole field is a war between what's proven and what's going viral. So we tag all of it — and tell you which is which, before you spend a penny or an ounce of hope.
Backed by good human evidence — trials, or large and consistent studies. The closest thing to a safe bet in this field. Weight, smoking, alcohol, sleep, folic acid.
Plausible and pointing the right way, but the human evidence is thin or mixed. Fine to try if it's cheap and safe. Cooling, some supplements, exposure reduction.
No credible evidence, or evidence of harm. Whatever the podcast said. Testicle tanning, "detox" protocols, miracle blends, the raw-garlic industrial complex.
Fertility is measurable, and a lot of it is in your hands — weight, sleep, heat, tobacco, alcohol. We show you which levers move the needle, and roughly by how much. It's a read on your whole health, not just baby-making.
The tests worth doing and when, the supplements with real evidence, and the honest truth about what each number can and can't say. An AMH result shows your egg reserve — not whether you'll conceive this year. No single test can.
Checkout for The Circle opens this week, and the app — testing and tracking for both of you — is in build. Founding-list members lock the £10 rate, get the Top 10 first, and steer what we build next. Tell us what you want most:
The Second Opinion — fortnightly. One new study explained, one viral claim graded, one thing worth doing. Five minutes, no woo.