For individuals

Know your sperm. Then make it better.

Midwinter finds the root causes behind your sperm health and treats them over 90 days, one full cycle of sperm production.

Get tested How it works
01 — How it works

From your couch to a new generation of sperm.

DAY 1 · DAY 90

  1. DAY 0

    Order

    Order online. Your kit ships to your door, with a lab order for your blood draw.

  2. DAY 1

    Collect

    Collect semen and urine at home and send them back in the prepaid box. A quick blood draw at a lab near you.

  3. WITHIN A WEEK

    Understand

    Your results, sperm age and root cause report arrive in the app. A physician reviews your protocol.

  4. DAY 1 TO 90

    Treat

    Follow your protocol: precise dosages and daily changes, adjusted as your data comes in.

  5. DAY 90

    Retest

    A second kit shows what changed. A new generation of sperm, measured.

02 — Your diagnostics

Why your sperm is the way it is, and what strengthens it.

ILLUSTRATIVE CASE · NOT A REAL PATIENT

A · THE OVERVIEW

One score. Four systems behind it.

Every result is traced to one of four systems in your body.

  • 01A fertility score you can track over 90 days
  • 02A plain-language summary of what is off, and why
  • 03Each system’s load, explained for your life
Midwinter · Diagnostics

MIDWINTER / DIAGNOSTICS

Your fertility diagnostics

Healthy fertility score · 4 of 7 parameters to optimize
Sample received Friday, 11:00

Three of your seven parameters are in range. The four that aren’t trace to two axes: oxidative load driving motility and DNA integrity, and late-night training suppressing overnight testosterone.

THE FOUR SYSTEMIC AXESEvery parameter is traced back to one of these
01High load

Redox equilibrium

Sperm shed the antioxidant defences other cells keep. Your redox imbalance is the main driver of three parameters.

02Moderate load

HPG-axis resilience

Your 21:40 training pushes cortisol into the window when testosterone should be rising overnight.

03Low load

Environmental load

Your exposure profile is clean. Scrotal heat load is mildly raised.

04Optimal

Metabolic function

Well controlled, and not contributing to any parameter.

B · YOUR PARAMETERS

Every parameter, against the reference.

Where you sit on each range, what is driving it, and what is fine as it is.

  • 01Measured against WHO references
  • 02A driving system for every result
  • 03What to fix first, and what to leave alone
Midwinter · Diagnostics
YOUR PARAMETERSSelect any parameter to see the cause
Progressive motilityNeeds optimization

Below range, driven by oxidative stress

31%

WHO ref ≥ 42%

DRIVING AXIS REDOX EQUILIBRIUM

Sperm concentrationNeeds optimization

Below range, driven by overnight androgen suppression

11M/mL

WHO ref ≥ 16 M/mL

DRIVING AXIS HPG-AXIS RESILIENCE

DNA fragmentation indexNeeds optimization

Marginally above range, same oxidative origin

26%

WHO ref < 25%

DRIVING AXIS REDOX EQUILIBRIUM

Total motile sperm countNeeds optimization

Below target, a composite of the two above

13M

Target ≥ 20 M

DRIVING AXIS HPG-AXIS RESILIENCE

Normal morphologyIn range

In range. Hold, with one watch item

5%

WHO ref ≥ 4%

DRIVING AXIS ENVIRONMENTAL LOAD

Semen volumeOptimal

Accessory gland function is intact

3.8mL

WHO ref ≥ 1.4 mL

DRIVING AXIS METABOLIC FUNCTION

C · THE CAUSE

Tap a result. See why.

Each parameter opens to its cause in plain English, and the signals that point to it, weighted.

  • 01The mechanism, explained for you
  • 02Contributing drivers, by share of signal
  • 03The logic behind your protocol
Midwinter · Diagnostics
Progressive motilityNeeds optimization

Below range, driven by oxidative stress

31 %

WHO ref ≥ 42%

Your motility is below range, and we have traced the cause to elevated ROS. Reactive oxygen species stiffen the sperm membrane, degrade the mitochondria that power movement, and oxidise the tail itself. Your protocol targets ROS: lower it, and motility measurably rises.

WHAT THIS PARAMETER IS

The share of sperm swimming forward in a straight line. It is the parameter most tightly coupled to natural conception: only progressively motile sperm can cross the cervical mucus and reach the egg.

CONTRIBUTING DRIVERS

Antioxidant capacity18 ≥ 30

Total antioxidant capacity is being outpaced by oxidant production.

62% of signal
Oxidative DNA damage9.4 ng/mL < 6.0

Direct evidence of oxidative attack on sperm DNA and membranes.

24% of signal
Sleep regularity61 > 80

Irregular sleep timing raises overnight oxidant load.

14% of signal
View protocol logic →
03 — The app

Your sperm, every day. Not once a year.

One score each morning, a protocol built around your day, and a live projection of where your sperm will be on day 90.

  • TODAYA daily performance index, and your protocol grouped by what it fixes: motility, DNA integrity, count.
  • TRAJECTORYHow far you are through your first full spermatogenesis turnover, and projected day 90 results.
  • RESULTSEvery report, every marker, from day 1 to day 90.
  • LOGSleep, training, heat and meals, so the protocol adapts to your life.
Two phone screens from the Midwinter app. Today: a performance index of 88, primed, with the day's protocol grouped by sperm motility, DNA integrity and sperm count. Trajectory: 47 percent through the first full spermatogenesis turnover, with projected day 90 concentration, motility and DNA fragmentation.
04 — Pricing

One price. Everything included.

The 90-day program

RECOMMENDED

$965

  • Day 1 diagnostics across semen, blood and urine
  • Root cause report and your sperm age
  • 90-day precision protocol, reviewed by a physician
  • Day 90 retest and before-and-after report
  • The Midwinter app: your daily plan and progress
Join the waitlist

Diagnostics only

$600

Day 1 diagnostics across semen, blood and urine, your root cause report and your sperm age. Upgrade to the full program at any time.

Join the waitlist

RESULTS

One to seven days after your samples reach the lab.

AVAILABLE IN

Across the US. EU: join the waitlist.

MEDICAL OVERSIGHT

Reviewed and prescribed by licensed physicians.

LABS

Processed in CLIA-certified labs.

05 — Questions

Questions, answered.

Why Midwinter?

Midwinter builds research-backed predictive models for male fertility, providing you with intelligent diagnostics you would normally get from 4+ specialists combined.

Do I need a referral from my doctor?

No. A licensed physician in our network orders your tests and reviews your protocol.

Is my data private?

Yes. Your health data is handled under HIPAA, never sold, and you can export or delete it at any time. Read our privacy policy.

What if my results are normal?

Normal isn’t strong. Normal ranges only rule out a problem. Your sperm can still get stronger, and your child gets the best start in life.

Can I do Midwinter alongside IVF or IUI?

Yes, and it’s the best time to. Half of the embryo comes from sperm, and high sperm DNA damage roughly doubles the risk of miscarriage. 90 days is one full cycle of sperm production, so starting before your next retrieval or IUI means stronger sperm, healthier embryos and better odds every cycle.

Where is Midwinter available?

Across the US. The EU is on the waitlist.

Your next generation of sperm starts today.

The 90-day program is $965, with diagnostics, protocol and a day 90 retest included.

Join the waitlist