Male Fertility Testing When Trying to Conceive After 35

When a couple is trying to conceive and encountering challenges, the conversation often focuses initially on the female partner — particularly for women over 35, for whom age-related changes in fertility are well-documented. However, male factor infertility contributes to approximately 40–50% of infertility cases, according to research consistently cited in reproductive medicine literature. Evaluating both partners early tends to be more efficient than working through an extended female-only workup before male-side factors are assessed.

Ads

This overview covers what male fertility testing involves, what semen analysis parameters mean, and when additional evaluation may be recommended.

Why Male Fertility Testing Matters Early

According to the American College of Obstetricians and Gynecologists, a complete infertility evaluation involves assessment of both partners. A semen analysis is one of the least invasive and least expensive components of a fertility workup — typically costing $100–$300 — which makes it a logical early step when conception has not occurred after an expected period of trying.

For women over 35 who are working with a reproductive endocrinologist, the male partner’s semen analysis is typically ordered at or near the first appointment. Delaying this evaluation while pursuing extensive female-side testing can add time and cost if a male factor is ultimately identified.

What a Semen Analysis Measures

Ads

A semen analysis examines several parameters of sperm quality and quantity. Results are compared against reference ranges established by the World Health Organization (WHO), most recently updated in 2021.

Count (Concentration)

Sperm concentration refers to the number of sperm per milliliter of semen. The WHO lower reference limit is 16 million sperm/mL (2021 guidelines). A total motile sperm count — combining concentration, volume, and motility — is often considered a more clinically relevant number for treatment planning than concentration alone.

Motility

Motility refers to the percentage of sperm that are moving. Total motility includes all moving sperm; progressive motility refers specifically to sperm moving forward in a linear or large circular pattern. The WHO lower reference for progressive motility is 30%. Motility is often considered one of the most clinically meaningful parameters — sperm that can’t reach the egg cannot fertilize it regardless of count.

Morphology

Morphology refers to the shape and structure of sperm. Using strict Kruger criteria, the lower reference limit is 4% normal forms. Morphology results often confuse patients because even in fertile men, the majority of sperm are considered morphologically abnormal — “4% normal” is a threshold, not an ideal. Isolated morphology abnormalities (with normal count and motility) are associated with somewhat lower fertilization rates but don’t preclude natural conception or IUI success.

Volume and pH

Semen volume reflects the contribution of accessory glands; very low volume can indicate ejaculatory duct obstruction or retrograde ejaculation. pH is a marker of gland function and can help identify specific anatomical issues when volume is abnormal.

Does Male Age Affect Sperm Quality?

Research indicates that male reproductive aging is real, though the changes are more gradual and less pronounced than female age-related fertility decline. Studies have found associations between advanced paternal age (typically defined as 40–45+) and modest reductions in sperm motility and morphology, as well as increased DNA fragmentation in sperm. Some research also suggests associations between advanced paternal age and certain pregnancy and offspring outcomes, though the absolute risk increases are generally modest compared to maternal age effects.

For couples where the male partner is also over 35 or 40, discussing both partners’ age-related factors with a reproductive endocrinologist provides a more complete picture. This context often comes up when discussing the range of factors affecting conception after 35.

When Further Testing May Be Recommended

A semen analysis provides a useful initial screen, but there are situations where additional testing may be recommended:

Repeat Semen Analysis

Sperm parameters can vary considerably between samples — affected by factors including recent illness (fever in particular can temporarily suppress sperm production for up to 3 months), ejaculatory frequency, and collection conditions. A single abnormal result often prompts a repeat analysis before concluding that a problem is persistent.

Hormone Testing

If the semen analysis shows very low sperm count or azoospermia (no sperm), hormonal evaluation — FSH, LH, testosterone, and prolactin — helps distinguish between testicular failure (elevated FSH) and hormonal or obstructive causes (normal or low FSH). This guides whether further evaluation by a urologist specializing in male infertility is indicated.

Sperm DNA Fragmentation Testing

Sperm DNA fragmentation (SDF) testing measures the degree of DNA damage within sperm. Some research associates high fragmentation rates with reduced fertilization rates, impaired embryo development, and recurrent pregnancy loss — even when standard semen analysis parameters appear normal. SDF testing is not yet universally recommended but may be considered in cases of unexplained infertility, recurrent miscarriage, or failed IVF cycles despite good-quality embryos.

Genetic Testing

In cases of very low sperm count (severe oligospermia) or azoospermia, genetic evaluation — including karyotype and Y-chromosome microdeletion testing — may be recommended. Y-chromosome microdeletions are a known cause of impaired spermatogenesis; identifying them informs both prognosis and, in some cases, the likelihood of sperm retrieval for IVF with ICSI.

Understanding where male fertility evaluation fits within the broader treatment decision framework — including when IVF becomes relevant — helps couples make more informed decisions at each step.

Frequently Asked Questions

How is a semen analysis done?

A semen sample is typically collected via masturbation into a sterile container, either at the clinic or at home with prompt delivery (within 30–60 minutes, kept at body temperature). The laboratory analyzes the sample under microscopy for the parameters described above. Abstinence of 2–5 days before collection is generally recommended for optimal results. Results are typically available within a few days.

What if the semen analysis is abnormal?

An abnormal semen analysis is typically repeated before conclusions are drawn, given natural variability. If a second analysis confirms abnormal parameters, referral to a urologist specializing in male infertility (andrologist) is usually the next step for evaluation of possible causes. Treatment options — ranging from lifestyle modifications and hormonal treatment to surgical correction of varicocele or, in more severe cases, sperm retrieval for ICSI — depend on the specific findings. Many causes of abnormal semen analysis are treatable or manageable.

Can lifestyle changes improve sperm quality?

Research suggests that several modifiable factors are associated with sperm parameters, including smoking, heavy alcohol use, anabolic steroid use, obesity, and heat exposure (hot tubs, laptops on lap). Addressing these factors is generally recommended as a first step when they’re present, though the degree of improvement varies by individual and by the specific underlying cause of impaired parameters. The timeline for change reflects spermatogenesis — sperm development takes approximately 72–90 days, so changes in lifestyle take at least 3 months to potentially be reflected in a semen analysis.

Does a normal semen analysis mean there are no male fertility issues?

A normal standard semen analysis is reassuring but does not completely rule out all male-side factors. Sperm DNA fragmentation, for example, can be elevated even when standard parameters appear normal. For couples with unexplained infertility or recurrent pregnancy loss, discussing whether additional male-side testing is warranted with a reproductive endocrinologist is reasonable. A normal semen analysis does, however, substantially reduce the likelihood of severe male factor infertility.

Key Takeaways

Male factor contributes to approximately 40–50% of infertility cases; evaluating the male partner early rather than late in a workup is generally more efficient.
A semen analysis measures sperm count, motility, and morphology against WHO reference ranges; a single abnormal result is typically repeated before conclusions are drawn.
Advanced paternal age is associated with modest reductions in sperm quality and increased DNA fragmentation, though the effects are more gradual than female age-related fertility decline.
Sperm DNA fragmentation testing may be relevant in cases of unexplained infertility, recurrent pregnancy loss, or failed IVF cycles despite normal standard parameters.
Many causes of abnormal semen analysis are treatable or manageable; an abnormal result is a starting point for evaluation, not a conclusion.