Jack Fertility is a home-to-lab sperm test that lets you check your sperm health without setting foot in a clinic.

Collect your sample whenever it suits you, drop our discreet kit into any Royal Mail postbox, and our Oxford lab runs a full WHO-standard semen analysis.

Within 2 working days you get an interactive, AI-assisted report that explains your numbers and how to improve them. Featured in GQ, Men's Health, The Guardian and The Sunday Times, and named one of Startups Magazine's top startups of 2025.

We serve the United Kingdom.

Why work with us

Jack Fertility never outsources testing to anonymous third party labs. Every kit goes straight to our own dedicated Oxford lab, so you always know who is handling your sample and how it is being tested.

Our proprietary SpermShield preservative and innovative packaging are engineered for the UK postal system, so samples stay stable whatever the weather. The kit is designed to fit through any Royal Mail postbox, so you never have to book a courier or sit in a clinic waiting room.

We also take the awkwardness out of sperm health. Your results are explained through a secure, interactive, AI assisted experience that turns lab data into plain English and, if you choose, puts your numbers in the context of a lifestyle survey that covers more than 50 factors known to affect male fertility.

Our kits are discreet, contain no personal identifiers and use tamper evident seals, so you get convenience, clarity, and total privacy in one.