What You Should Know About Infertility?

Understanding what causes infertility is the first step toward getting the right help. Infertility affects roughly 1 in 8 couples in the US, and many don’t realize it impacts men just as often as women. Here’s a clear, honest overview of the causes, risk factors, and treatment options — including when to seek help and what to realistically expect.

What Causes Infertility in Women and Men?

Infertility is defined as the inability to conceive after 12 months of regular, unprotected intercourse — or after 6 months if the woman is over 35. It can also be diagnosed following recurrent pregnancy loss (two or more consecutive miscarriages). For a deeper look at the medical definition and how it’s classified, see our overview of what infertility is.

The causes split roughly three ways:

• Female factors (approx. 40%) — ovulation disorders, blocked fallopian tubes, endometriosis, uterine abnormalities, or diminished ovarian reserve
• Male factors (approx. 40%) — low sperm count, poor motility or morphology, hormonal imbalances, or structural issues
• Combined or unexplained (approx. 20%) — both partners contribute, or no specific cause is found despite full testing

Infertility is not a “woman’s problem” — that assumption delays diagnosis and treatment for far too many couples. Any proper evaluation should include both partners from the very beginning. There are a lot of male infertility myths that still circulate and push men away from getting tested.

Who Is Most at Risk for Infertility?

Several known risk factors raise the likelihood of infertility, according to the American Society for Reproductive Medicine (ASRM):

• Age — Egg quality and quantity decline after 35. Male fertility also decreases with age, though more gradually.
• Weight — Both obesity and being underweight disrupt hormone levels and ovulation. Excess weight in men lowers testosterone and reduces sperm quality.
• Smoking — Linked to lower egg reserves in women and reduced sperm count and motility in men.
• Alcohol — Even moderate drinking can affect hormone balance and reduce conception rates for both partners.
• Sexually transmitted infections (STIs) — Chlamydia and gonorrhea, when untreated, can cause scarring that blocks the fallopian tubes or damages sperm production.
• Endometriosis — Tissue growing outside the uterus can affect ovarian function and restrict egg release.
• Prior pelvic inflammatory disease (PID) — Often a result of untreated STIs, PID causes internal scarring that interferes with conception.

Many of these risk factors are tied to daily habits and choices. Our guide to lifestyle factors that contribute to infertility covers each one in practical detail and explains what couples can do to reduce their exposure.

Can Infertility Be Prevented?

Some causes can be reduced. Quitting smoking, maintaining a healthy weight, limiting alcohol, and treating STIs early all lower the risk meaningfully. But many causes of infertility have no clear preventable trigger — particularly age-related decline and structural or genetic conditions.

Unexplained infertility, where testing finds nothing specifically wrong, accounts for a significant share of all cases. You can’t prevent what you can’t identify. The most practical approach is to know your personal risk factors early and not delay evaluation if something feels off. Irregular cycles, painful periods, prior STIs, or a history of pelvic surgery are all reasons to get checked sooner rather than later.

What Are the Main Treatment Options for Infertility?

Treatment depends entirely on the cause. The most common options are:

• Ovulation induction — Medications like Letrozole (Femara) or Clomid stimulate egg development in women who aren’t ovulating regularly
• Intrauterine insemination (IUI) — Sperm is placed directly into the uterus around ovulation to improve the odds of fertilization
• IVF (in vitro fertilization) — Eggs are retrieved, fertilized in a lab, and the resulting embryos are transferred back to the uterus. This is the most effective assisted reproduction option for most diagnoses.
• Surgery — Used to correct structural problems like blocked tubes, fibroids, or endometriosis tissue

Understanding how the IVF process works from start to finish helps set realistic expectations before your first appointment. If IVF is the right path for you, the IVF medications involved — FSH injections, suppressants, trigger shots, and progesterone support — make up the largest share of the out-of-pocket cost, many patients order European-brand equivalents through Fast IVF at up to 80% less than US retail prices.

Frequently Asked Questions About Infertility

What is the clinical definition of infertility?

Infertility is the failure to achieve a pregnancy after 12 months of regular unprotected intercourse. For women over 35, that window shortens to 6 months. Two or more consecutive miscarriages also qualify as a diagnosis of infertility and warrant a specialist evaluation.

Is infertility more of a female problem or a male problem?

Neither — it’s split almost equally. Female factors and male factors each account for roughly 40% of cases. The remaining cases involve both partners or have no identified cause. Both partners should be evaluated at the same time to avoid unnecessary delays in diagnosis.

Can infertility be treated successfully?

For many couples, yes. Success rates depend on the cause, age, and treatment used. IVF generally offers the highest per-cycle success rates, particularly for women under 35 using their own eggs. A reproductive endocrinologist can give you a personalized estimate based on your specific situation.

Does infertility take an emotional toll?

Yes — significantly. The uncertainty, repeated appointments, and treatment cycles affect mental health just as much as physical health. Our post on the emotional side of infertility covers what’s normal to feel and where to find support during the process.

How can I reduce the cost of IVF medications?

IVF medications typically cost $3,000–$6,000 per cycle at US retail prices. Fast IVF sources European-brand equivalents from a licensed international provider at a fraction of that. Get a free quote to see what your specific protocol would actually cost — most patients are surprised by the difference.

Infertility is one of the most common medical conditions couples face — and one of the most treatable when caught and addressed early. If IVF medications are part of your plan, Fast IVF makes it straightforward to access them without the US retail markup. Request your free quote and see the difference for yourself.