Semen Analysis

By RRM Academy Reviewed by Dr. Naomi Whittaker, MD, Board-Certified OBGYN, MIGS, NFPMC, FCI Updated May 14, 2026

Semen analysis is the primary initial laboratory assessment for male-factor infertility, evaluating sperm concentration, total motility, progressive motility, morphology, semen volume, and additional parameters according to World Health Organization reference criteria.¹ It is among the first investigations ordered when a couple presents with difficulty conceiving, reflecting that male factor is the sole cause in approximately 20% of couples and a contributing cause in an additional 30 to 40%.

A result within reference ranges does not rule out male-factor contribution. Semen analysis measures the quantity and movement of sperm; it does not assess the integrity of sperm DNA. Sperm DNA fragmentation can be elevated in men with normal concentration, motility, and morphology, and is independently associated with reduced fertilization, poor embryo development, and recurrent pregnancy loss.²³ A normal semen analysis in the context of unexplained infertility or recurrent loss should prompt evaluation of functional sperm parameters beyond standard morphology.

Oxidative stress is another male-factor contributor that standard semen analysis does not capture. Reactive oxygen species generated by lifestyle factors, infection, varicocele, and environmental exposures can impair sperm function even when conventional parameters appear normal.⁴⁵ Clinicians who evaluate both partners thoroughly from the outset do not stop at semen analysis when the result is normal and infertility persists.

The restorative approach to male factor treats the man as a patient in his own right, not as a sample source. Identifying and correcting the upstream cause: whether varicocele, hormonal imbalance, infection, or oxidative load, improves sperm quality at its origin. Semen analysis is the starting point of that evaluation, not the end of it. A couple whose male partner has a normal result but remains undiagnosed deserves the same diagnostic persistence that restorative medicine applies to female-factor conditions.

This content is for educational purposes only and does not constitute medical advice. Consult an RRM clinician or healthcare provider for guidance specific to your situation.