{
  "slug": "bishop-score",
  "title": "Bishop Score Calculator",
  "heading": "Bishop Score for Labor Induction Readiness",
  "category": "fitness-health",
  "url": "https://www.revenuelab.fyi/toolbox/bishop-score",
  "summary": "Assess cervical favorability before scheduling induction of labor.",
  "description": "The Bishop score assesses how favorable the cervix is for induction of labor, scoring cervical dilation, effacement, station of the presenting part, consistency, and position, each 0-3 points (station 0-3, position 0-2), for a total of 0-13. A score of 8 or higher suggests a favorable cervix with a likelihood of successful vaginal delivery after induction similar to spontaneous labor, while a score of 6 or below suggests an unfavorable cervix where cervical ripening agents (like prostaglandins or a mechanical dilator) are typically used before or alongside oxytocin to improve the chance of successful induction and reduce the risk of a failed induction leading to cesarean delivery. A modified Bishop score adjusting for parity, prior cesarean, gestational age, and preeclampsia is sometimes used for more individualized risk prediction, but the classic score remains the standard bedside tool for induction planning discussions. This tool is for education and workflow support only — not medical advice. Always verify results with a clinician and use clinical judgment alongside your institution's protocols.",
  "formula": "Sum of: Dilation(0-3) + Effacement(0-3) + Station(0-3) + Consistency(0-2) + Position(0-2), total 0-13.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=bishop-score",
  "inputs": [
    {
      "id": "dilation",
      "label": "Cervical dilation",
      "kind": "select",
      "hint": null,
      "default": "1",
      "options": [
        {
          "value": "0",
          "label": "Closed (0)"
        },
        {
          "value": "1",
          "label": "1-2 cm (1)"
        },
        {
          "value": "2",
          "label": "3-4 cm (2)"
        },
        {
          "value": "3",
          "label": "≥5 cm (3)"
        }
      ]
    },
    {
      "id": "effacement",
      "label": "Effacement",
      "kind": "select",
      "hint": null,
      "default": "1",
      "options": [
        {
          "value": "0",
          "label": "0-30% (0)"
        },
        {
          "value": "1",
          "label": "40-50% (1)"
        },
        {
          "value": "2",
          "label": "60-70% (2)"
        },
        {
          "value": "3",
          "label": "≥80% (3)"
        }
      ]
    },
    {
      "id": "station",
      "label": "Fetal station",
      "kind": "select",
      "hint": null,
      "default": "1",
      "options": [
        {
          "value": "0",
          "label": "−3 (0)"
        },
        {
          "value": "1",
          "label": "−2 (1)"
        },
        {
          "value": "2",
          "label": "−1 / 0 (2)"
        },
        {
          "value": "3",
          "label": "+1 / +2 (3)"
        }
      ]
    },
    {
      "id": "consistency",
      "label": "Cervical consistency",
      "kind": "select",
      "hint": null,
      "default": "1",
      "options": [
        {
          "value": "0",
          "label": "Firm (0)"
        },
        {
          "value": "1",
          "label": "Medium (1)"
        },
        {
          "value": "2",
          "label": "Soft (2)"
        }
      ]
    },
    {
      "id": "position",
      "label": "Cervical position",
      "kind": "select",
      "hint": null,
      "default": "1",
      "options": [
        {
          "value": "0",
          "label": "Posterior (0)"
        },
        {
          "value": "1",
          "label": "Mid-position (1)"
        },
        {
          "value": "2",
          "label": "Anterior (2)"
        }
      ]
    }
  ],
  "outputs": [
    {
      "id": "score",
      "label": "Bishop score",
      "format": "number",
      "hint": null,
      "primary": true
    },
    {
      "id": "favorability",
      "label": "Induction favorability",
      "format": "raw",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Cervical dilation: 1-2 cm (1)",
      "Effacement: 40-50% (1)",
      "Fetal station: −2 (1)",
      "Cervical consistency: Medium (1)",
      "Cervical position: Mid-position (1)"
    ],
    "outputs": [
      "Bishop score: 5",
      "Induction favorability: Unfavorable — cervical ripening agent typically recommended before oxytocin"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter cervical dilation.",
      "Enter effacement.",
      "Enter fetal station.",
      "Enter cervical consistency.",
      "Enter cervical position.",
      "Read your bishop score on the right — it updates as you type.",
      "Hit Share to keep the scenario or send it to someone."
    ]
  },
  "scenarios": [
    {
      "name": "Conservative",
      "description": "Lower-end numbers — what if things land soft?",
      "values": {
        "dilation": "1",
        "effacement": "1",
        "station": "1",
        "consistency": "1",
        "position": "1"
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "dilation": "1",
        "effacement": "1",
        "station": "1",
        "consistency": "1",
        "position": "1"
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "dilation": "1",
        "effacement": "1",
        "station": "1",
        "consistency": "1",
        "position": "1"
      }
    }
  ],
  "limitations": [
    "Population formulas describe averages; individual bodies vary, especially at the extremes of height, age, or muscle mass.",
    "Results do not account for medical conditions, medication, or pregnancy.",
    "Use this as a directional reference, not a diagnosis — talk to a clinician before acting on it."
  ],
  "faq": [
    {
      "q": "What Bishop score is considered favorable for induction?",
      "a": "A score of 8 or higher is generally considered favorable, associated with a likelihood of successful induction comparable to spontaneous labor. Scores of 6 or below are considered unfavorable and typically prompt use of a cervical ripening method before or alongside oxytocin to improve the odds of vaginal delivery."
    },
    {
      "q": "What happens with an unfavorable Bishop score before induction?",
      "a": "Cervical ripening agents — prostaglandin preparations (like misoprostol or dinoprostone) or mechanical methods (like a Foley balloon catheter) — are commonly used first to soften and dilate the cervix, since starting oxytocin on a very unfavorable cervix increases the risk of a prolonged, failed induction and higher cesarean rates."
    },
    {
      "q": "Does parity affect how the score should be interpreted?",
      "a": "Yes, informally — multiparous patients tend to have more favorable induction outcomes at a given Bishop score than nulliparous patients, since prior vaginal delivery affects cervical and pelvic factors not fully captured by the score. Some modified versions explicitly add points for multiparity, but the classic score does not."
    },
    {
      "q": "Can Bishop score predict cesarean risk directly?",
      "a": "It correlates with induction success broadly, but it's a labor-planning tool, not a precise cesarean-risk calculator — many other factors (fetal size, maternal pelvis, indication for induction, gestational age) also influence whether an induction ultimately ends in cesarean delivery."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/glasgow-coma-scale",
    "https://www.revenuelab.fyi/toolbox/curb-65-score",
    "https://www.revenuelab.fyi/toolbox/shock-index"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Bishop Score Calculator (https://www.revenuelab.fyi/toolbox/bishop-score)"
}