98% of homes are within ½ mile of a postbox
110,000+ postboxes vs 141 fertility clinics. Jack decided to use the postal network that's already on your street rather than rely on you visiting us.
The system was built for fertility treatment. Not proactive sperm health.
By the time most men test, fertility has already become a problem. Jack exists to change the starting point.
12 months of trying
That is how long couples are expected to try before NHS fertility investigations can begin.
Around half
Male factors contribute to around half of fertility difficulties. Most of the testing burden still falls on women.
Clinic-first by default
The current pathway is built around appointments, referrals and treatment. Not simple, repeatable testing before you need help.
Jack is built for a different stage
Sperm takes roughly 74 days to regenerate. Lifestyle, stress, heat, illness and environment all shift things over time. Testing earlier gives you a baseline, not just a problem report.
Not fertility treatment.
Preconception.
Not crisis response.
Earlier awareness.
Not clinic systems.
Real life.
You should be able to check in on your sperm health the way you check in on the rest of your body. Earlier. Easier. On your own terms.
Fertility should not start with a crisis.
Why it matters
A clinic visit typically emits around 5,000g CO₂ - mostly the drive there and back. A Jack test by post: ~165g. Around 30× less.
Jack was built to use less. Biology requires some plastic. Labs use energy. Digital carries a footprint. We stripped everything else back.
Nothing that doesn't belong
Plastic only where essential to safeguard your sperm sample. Everything else in your kit: 100% recyclable.
Digital, not paper
We're a paperless lab. No printed reports. Minimal waste. Results delivered instantly online using systems that run only when you access them.
One lab. The whole UK.
Every Jack test is processed at our lab at the Wood Centre for Innovation in Oxford - a research facility set in 15 acres of woodland. One location means tight quality control and a smaller footprint than running multiple sites across the country.
Royal Mail is the UK’s greenest delivery option
Your kit joins a postal route that's already running. Royal Mail operates the UK's largest electric delivery fleet (~7,000 vehicles), with over 50% of final-mile deliveries on foot or zero-emission.
Carbon estimates: DfT average vehicle emissions data (2024); Royal Mail per-parcel emissions data (2024/25). Clinic locations: HFEA (2024/25). Postbox locations: Royal Mail (2024). Distances are straight-line calculations from postcode centroids. Methodology available on request: impact@jackfertility.co.uk