Male Factor Infertility: The Overlooked Half of the Equation

Here’s how it usually goes. She goes through every test you can name. Bloodwork, ultrasounds, an HSG, cycle tracking, sometimes rounds of ovulation induction medication. And if all of that comes back normal, then, finally, he gets a single semen analysis. One. No one looks any deeper. No one does a real deep dive into his history, his health, or the daily habits that might be shaping those numbers.

By the time a couple finds me, this has often been going on for years. My work is virtual, so I’m not the one running their labs. I’m the one who reads the whole story and asks the question no one has asked yet: has anyone actually taken a real look at his side?

If you’ve been doing everything “right” and still aren’t pregnant, here’s something you may never have been told. Male factor is a contributing cause in nearly half of all couples who struggle to conceive. Yet it’s the half that gets tested last, looked at least, and optimized almost never. And it’s often the half you can do the most about.

What is male factor infertility, really?

Male factor infertility means something on the sperm side is making conception harder, whether that’s the count, the movement, the shape, the DNA inside, or how the sperm is delivered. It’s involved in roughly 40 to 50% of couples who can’t conceive, and it’s the only cause in about one in five (American Society for Reproductive Medicine).

Sit with that number. In half of all cases, the male partner is part of the picture. Not as a blame thing. As a math thing. It takes two sets of cells to make an embryo, and for a long time the testing has pointed almost entirely at one of them.

Why does the male side get overlooked?

Because the order is backwards. She gets the full workup. He gets one test, if that, and only after everything on her side has come back clear.

I worked with a couple who had been trying for the better part of a decade. She had done every test, and had even been on ovulation induction medication for years. In all of that time, no one had ordered a semen analysis. When they finally got one, the result stopped me cold. There was no sperm in the sample at all. Azoospermia. They had spent years, and so much hope, on treatment aimed entirely at her, while the real barrier sat unexamined the whole time.

That is the clearest version of a pattern I see constantly. His half is assumed to be fine until proven otherwise, when it should be one of the first things checked, because it’s the easiest thing to rule in or out. A semen analysis is non invasive, inexpensive, and quick. There’s no good reason for it to be an afterthought. And even when it does get done, one number on a page is not the same as actually understanding his health.

If we’re doing IVF with ICSI, does his health even matter?

Yes, and more than you’ve probably been told. IVF with ICSI, where a single sperm is injected directly into an egg, can get you past a low count or poor movement. But it does not fix the sperm quality. And it does nothing for the DNA inside the sperm.

This is my honest concern with how often clinics reach for IVF with ICSI by default. It’s a remarkable tool, and for many couples it’s exactly the right call. But using it to get around the male side, without ever asking why his numbers look the way they do, can mean a real missed opportunity. High sperm DNA fragmentation, meaning damage to the genetic material inside the sperm, is linked to lower embryo quality and a higher risk of miscarriage. ICSI does not change that. You can place a single sperm into an egg perfectly and still carry that damage forward.

So the question to bring to your team isn’t “should we do ICSI or not.” It’s this. Before we rely on IVF with ICSI, have we looked at why his results are what they are, and is any of it improvable first? That one question changes the entire conversation.

What’s actually within his control?

A meaningful amount of male fertility is modifiable. Sperm is produced fresh on a constant cycle, which means the changes he makes now can show up in a sample a few months from now. The biggest levers:

• Heat. Frequent hot tubs, saunas, long stretches with a laptop on his lap. Sustained heat to the testicles lowers sperm production.
• Smoking and THC. Both are linked to lower counts and more DNA damage. This includes cannabis, which surprises a lot of people.
• Alcohol, in regular or higher amounts.
• Weight and blood sugar. Metabolic health and sperm health move together.
• Medications and supplements. Some common ones, including certain testosterone products, can sharply lower sperm counts. Always worth a review.
• Nutrition and oxidative stress. A diet heavy in processed food and light on antioxidants leaves sperm more vulnerable to DNA damage.

I will never forget a couple who came to me after several pregnancy losses. We looked at a semen analysis, and the parameters were abnormal across the board. As we talked, the picture filled in. He smoked daily, used THC now and then, and was in the hot tub most nights. None of it was a moral failing. He simply had no idea any of it touched his fertility, because no one had ever connected those dots for him. He changed three things. About three months later, they were pregnant.

How long does it take to see a difference?

About 72 to 90 days. That’s roughly how long it takes the body to make a fresh batch of sperm from start to finish. So a change he makes today won’t show up tomorrow, but it can show up in a sample a few months out.

I love this, because it means his current results are really a snapshot. A window into his health, his lifestyle, and his habits over the last three months or so. Not a verdict. A picture of one season that he has the power to change.

Here’s the part I always have to name for the guys. A lot of men haven’t seen a doctor since their pediatrician. And if they have, they’re used to taking medicine for something quick, like a sinus infection. You take it for ten days, you feel better, you’re done. Sperm doesn’t work like that. Because it takes so long to make, the changes he makes, and any medication he’s prescribed, have to be consistent. Not for a week. He keeps going until you’re comfortable announcing your pregnancy. This is a long game, and consistency is the whole thing.

What should you ask your clinic about the male side?

Bring these. You don’t need to know the answers. You just need to ask the questions:

1. Have we done a full semen analysis, looking at count, motility, and morphology?
2. Should we test for DNA fragmentation, especially if there have been losses or failed cycles?
3. Before we rely on IVF with ICSI, is anything on his side improvable first?
4. Are any of his medications or supplements affecting his sperm?
5. What lifestyle factors should he be working on, and how long should we give them?

That last one matters because of the 72 to 90 day window. Optimizing takes a runway. The sooner he starts, the more it can do.

How do you go through this as a team?

Gently, and out loud. Male factor can land hard. Men are rarely given any framework for it, and the silence can turn into guilt fast. The reframe I come back to with couples is simple. This is not a verdict on him. It’s information for both of you. Half of the equation finally getting attention is a good thing. It means there’s somewhere new to look, together.

(More on navigating this as a couple in the partner-support post.)

You don’t have to figure out which questions are yours to ask

If you’re reading this thinking no one has ever really looked at his side, that’s exactly the kind of gap I help couples find. Not by replacing your medical team, but by helping you walk into every appointment knowing what to ask and why it matters.

Start with the Fertility Pattern Assessment. It takes a few minutes, there’s no pressure, and it’ll show you where the unexamined corners of your story might be, for both of you.

About the author

Jessica Boone, PA-C is a fertility and IVF strategist with more than a decade of experience across both male and female infertility, which makes her a bit of a unicorn in a field that usually treats the two as separate problems. For years she’s been the person friends, family, and clients call when they’re lost in the fertility system. Through Fortitude Fertility Consulting, she builds the strategy couples are rarely given the time to build, so they stop saying yes to whatever’s next and start making real decisions about their care. Fortitude offers strategy and education, not medical care.