Disease or Syndrome
oligospermia
Subclass of:
Male infertility
Definitions related to oligospermia:
  • A condition of suboptimal concentration of SPERMATOZOA in the ejaculated SEMEN to ensure successful FERTILIZATION of an OVUM. In humans, oligospermia is defined as a sperm count below 20 million per milliliter semen.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • Decreased number of spermatozoa in the semen.
    NCI
    U.S. National Cancer Institute, 2021
  • A disorder characterized by a decrease in the number of spermatozoa in the semen.
    Common Terminology Criteria for Adverse Events
    U.S. National Institutes of Health, 2021
  • Low sperm count means that the fluid (semen) you ejaculate during an orgasm contains fewer sperm than normal.
    Mayo Clinic
    Mayo Foundation for Medical Education and Research, 2025
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.