CoolMen

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Developing science-backed cooling technology to support male fertility. Wearable, discreet and designed for everyday life.

15/10/2026

We've spent weeks posting about s***m biology without saying much about what we make. So, plainly:

CoolMen is a wearable active cooling system.

It's built around one biological fact: s***m production runs cooler than the rest of the body. Scrotal skin sits several degrees below core temperature — that's why the te**es are outside the body in the first place.

CoolMen is designed to help maintain those cooler local conditions. It's wearable, made for everyday use during the day or at night, and USB-C powered. It's a Class I medical device under the EU Medical Device Regulation.

What it isn't: a treatment for infertility. It doesn't guarantee better semen results, conception or pregnancy. Temperature is one factor among many, and fertility concerns belong with a doctor first.

See how it works at becoolmen.com (link in bio).

***mHealth

12/10/2026

"Below reference" on a semen analysis doesn't mean infertile. Here's where those lines come from.

The WHO reference values are built from about 3,500 men whose partners conceived naturally within 12 months. The lower limit for each parameter is the 5th percentile of that group.

Read that again: 5% of those men — all of them fathers — were below each limit.

The current lower limits: concentration 16 million per mL, total motility 42%, progressive motility 30%, normal forms 4%, volume 1.4 mL.

Yes, 4%. A report showing that most s***m look "abnormal" can still be inside the reference range.

So the limits describe a fertile population. They aren't a line between fertile and infertile, and one number alone doesn't settle anything. What a result means for you is a question for your doctor.

Save this before your next result.

***mHealth

08/10/2026

There's a fertility factor a lot of men carry without ever feeling it.

A varicocele is a set of enlarged veins around the testicle. It's identified in about 15% of healthy men — and in up to 35% of men with primary infertility. Most cause no symptoms, so many men first hear the word during a fertility workup.

Here's the part that gets lost: having a varicocele is not the same as being infertile. Plenty of men with one become fathers without any difficulty. It becomes relevant when it shows up together with abnormal semen results.

That's also how guidelines approach treatment: repair is considered when the varicocele can be felt on exam and semen parameters are abnormal. One that only shows up on a scan isn't a reason for surgery.

So this isn't something to diagnose from a list of symptoms. It's something a urologist checks in a few minutes.

Save this for later.

***mHealth

05/10/2026

A standard semen analysis looks at count, movement and shape. It doesn't look inside the s***m.

S***m DNA fragmentation — breaks in the DNA that s***m carry — is measured by a separate test. And it isn't a routine first step: major guidelines advise against it in the initial evaluation of a couple.

Where it does have a place is recurrent pregnancy loss. For couples with two or more losses, the AUA/ASRM guideline recommends evaluating the male partner, including s***m DNA fragmentation.

The research behind that: a review of 16 studies and 2,969 couples found miscarriage risk was about twice as high when s***m DNA damage was serious. That's an association across groups. It doesn't predict what happens for any one couple.

If you've had repeated losses, it's fair to ask whether your male partner has been evaluated too.

Save this for later.

***mhealth

02/10/2026

S***m are made fresh every day. They still age with you.

Researchers pooled 90 studies covering 93,839 men to see what male age does to semen. With increasing age, semen volume, s***m motility, normal morphology and DNA integrity all declined.

The surprise: s***m concentration didn't. Age showed up in how s***m move and how intact their DNA is — not in how many there are.

Two things this study does not say. It doesn't name an age where things "drop off." And it didn't measure how fast the change happens.

So male age is a real factor, and it deserves a place in the conversation next to female age. It's a gradual change, not a deadline.

What surprised you most?

***mhealth

29/09/2026

You track your sleep. Your steps. Your heart rate. This one number usually gets checked once, if ever.

Here's why that's actually consistent with the science, once you know the details: a single semen analysis is a snapshot, not a trend line. Results vary naturally from sample to sample — even with no change in health — influenced by things like days since your last ej*******on, and even which lab reads the sample.

It's also a slow metric. Unlike a heart-rate reading, a semen sample reflects biology from weeks earlier, since s***m take about 2–3 months to fully develop. So a "trend," not a single point, is what actually tells you something.

That's also exactly why major fertility guidelines recommend more than one test before drawing conclusions — repeat testing, not repeat panic.

Would you actually want to track this the way you track other health metrics?

***mhealth h

22/09/2026

If you're a guy whose partner is going through fertility testing or IVF prep, it's easy to feel like your role is mostly... waiting. Showing up to appointments, maybe, but not doing much else.

There's actually more you can do than that — and it's worth doing, not just as support, but because a male factor is involved in up to 60% of infertility cases (we covered the research behind that number in our last post).

A few concrete things: ask about getting a semen analysis early — you don't need to wait to be referred. Talk through known modifiable factors like heat exposure, smoking, and alcohol with a clinician, rather than trying to guess what matters. Track results or changes over time instead of relying on memory during an appointment. And go in expecting a real timeline — s***m take roughly 2–3 months to develop, so any change takes time to show up.

None of this is about taking over. It's about being part of the process, not standing next to it.

If you've been through this — what helped you feel like an active part of it, rather than a bystander?

18/09/2026

A semen analysis is not a scorecard on being a man. It can feel like one — but it isn't.

If you've gotten a male-factor diagnosis and it's hit harder than you expected, you're not overreacting. In a study of 446 men, those being treated for male-factor infertility showed no statistically significant difference in depression levels from men being treated for cancer.

That's worth sitting with for a second. This isn't a small thing to carry, and it was never supposed to be carried alone.

Here's the part that might surprise you: in that same study, most men — 73% — said they wanted more support around this, often through anonymous, peer-to-peer spaces. Wanting to talk about it isn't the exception. It's the norm.

A semen analysis measures reproductive biology. Not effort. Not character. Not manhood.

Tag or share this with someone who might need to hear it today.

15/09/2026

Understanding your own fertility test results can feel harder than actually taking the test.

That's part of why we're opening the Beta of MensFertility — a new platform where you can upload and organize your fertility results, understand what the numbers mean, and track changes over time.

The first feature live in Beta: semen analysis interpretation. Upload your lab report and our AI assistant breaks down the key parameters in plain language, and flags anything that may be worth discussing with a professional. It's built to help you understand your results — not to diagnose them.

We're also building couple profiles and a telemedicine network of andrologists, urologists, gynecologists and fertility specialists.

Beta spots are limited, and we're building this with real feedback from real users — including any criticism.

Apply for Beta access: becoolmen.com/pl/pages/mensfertility
MensFertility is developed by the team behind CoolMen

14/09/2026

Blood vessels, a lifting muscle and scrotal skin work together every day to keep the te**es cooler than the rest of the body — with zero conscious effort involved.

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Wroclaw
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http://becoolmen.com/

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