An adequate semen volume of ejaculate fluid is required to transport sperm into the female reproductive tract and allow for fertilization of the oocyte. Thus, seminal fluid volume is an important part of the semen analysis done to investigate male infertility. In this article, we review the anatomy and physiology of ejaculation, the various etiologies of low-volume ejaculation (artifactual, structural, functional). We then present a comprehensive algorithm for the evaluation, diagnosis and treatment of the infertile man presenting with low semen volume.
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