{
  "source": "lib/semenMetrics.ts (WHO_6TH_EDITION_LOWER_LIMITS)",
  "reference": "World Health Organization. WHO laboratory manual for the examination and processing of human semen, 6th edition. Geneva, 2021. Table 2.1, one-sided lower reference limits (5th centiles) from 3,589 fertile men; pH 7.2 is the manual’s consensus threshold, not a centile.",
  "referenceUrl": "https://www.who.int/publications/i/item/9789240030787",
  "note": "A value below a limit is below the reference range, not a diagnosis. Results vary between samples from the same man; clinics repeat the test before drawing conclusions.",
  "metrics": [
    {
      "key": "volume",
      "label": "Semen volume",
      "unit": "mL",
      "lowerLimit": 1.4
    },
    {
      "key": "concentration",
      "label": "Sperm concentration",
      "unit": "million/mL",
      "lowerLimit": 16
    },
    {
      "key": "totalCount",
      "label": "Total sperm count",
      "unit": "million",
      "lowerLimit": 39
    },
    {
      "key": "totalMotility",
      "label": "Total motility",
      "unit": "%",
      "lowerLimit": 42
    },
    {
      "key": "progressiveMotility",
      "label": "Progressive motility",
      "unit": "%",
      "lowerLimit": 30
    },
    {
      "key": "morphology",
      "label": "Normal morphology",
      "unit": "%",
      "lowerLimit": 4
    },
    {
      "key": "vitality",
      "label": "Vitality",
      "unit": "%",
      "lowerLimit": 54
    },
    {
      "key": "ph",
      "label": "pH",
      "unit": "",
      "lowerLimit": 7.2
    }
  ]
}