{
  "url": "https://dantelabs.com/traits/low-semen-volume",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "low-semen-volume",
    "id": "HP:6000135",
    "name": "Low semen volume",
    "definition": "Volume of semen in ejaculate below the lower limit of normal. This finding can be ascertained by semen analysis. Comment: Sperm are produced within the testis, in the process of spermatogenesis, then travel through the male reproductive tract (the seminiferous tubules, epididymis, vas deferens, prostate and urethra). As the sperm travel, seminal fluid is added from the seminal vesicles, prostate, testis and epididymis and periurethral glands. The function of the ejaculate is to transport sperm into the female genital tract and to provide a suitable environment for sperm survival during this transit.",
    "synonyms": [
      "Hypospermia"
    ],
    "systems": [
      {
        "slug": "abnormality-of-the-genitourinary-system",
        "name": "Abnormality of the genitourinary system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-genitourinary-system"
      }
    ],
    "broader": [
      {
        "slug": "abnormal-male-reproductive-system-physiology",
        "name": "Abnormal male reproductive system physiology",
        "url": "https://dantelabs.com/traits/abnormal-male-reproductive-system-physiology"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "cfap54",
        "symbol": "CFAP54",
        "hgnc": "HGNC:26456",
        "name": "cilia and flagella associated protein 54",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cfap54"
      }
    ]
  }
}