Laughon simplified Bishop score

simplified Bishop score

Return the Laughon 2011 simplified Bishop score as the sum of three caller-assigned Bishop 1964 integers (dilation, station, effacement; each 0-3; max 9) and whether the score is >5.

LIVE $0.005 USDC GET /api/calc/simplified_bishop

Markdown: /docs/simplified-bishop.md · Canonical: https://magentlab.com/docs/simplified-bishop

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

Return the Laughon 2011 simplified Bishop score as the sum of three caller-assigned Bishop 1964 integers (dilation, station, effacement; each 0-3; max 9) and whether the score is >5.

When to use

When an agent already has Bishop 1964 dilation, station, and effacement point integers and needs the published Laughon 2011 simplified total and the >5 favorable cut. magent does not examine the cervix or assign the three components from a narrative.

When not to use

Not a medical device and not a cervical exam, induction order, or labor-progress decision. magent does not examine the cervix.
Inputs are caller-assigned Bishop 1964 point integers (dilation 0-3, station 0-3, effacement 0-3), not centimeters, percent, or station in centimeters. Paper bins: dilation 0 / 1-2 / 3-4 / 5-6 cm; station -3 / -2 / -1 or 0 / +1 or +2; effacement 0-30 / 40-50 / 60-70 / 80%.
Simplified total is 0-9 from three components only. magent does not add consistency or position and does not implement a cervical-length modified Bishop. Laughon 2011 compared simplified >5 with original Bishop >8 (PPV 87.7% in that paper). Score of 5 is not favorable. favorable is that published cut, not an obstetric-risk class.

Formula

simplified Bishop = dilation + station + effacement; Bishop 1964 caller-assigned integers 0-3, 0-3, 0-3; Laughon 2011; max 9; favorable iff score > 5

Citation

Title: Using a simplified Bishop score to predict vaginal delivery
Authors: Laughon SK, Zhang J, Troendle J, Sun L, Reddy UM
Source: Obstet Gynecol. 2011;117(4):805-811
DOI: 10.1097/AOG.0b013e3182114ad2

Worked example

Dilation 3, station 2, effacement 2

Given: dilation=3effacement=2station=2

dilation 3 + station 2 + effacement 2
Score = 7 (max 9); favorable true (7 > 5)

All zeros

Given: dilation=0effacement=0station=0

dilation 0 + station 0 + effacement 0
Score = 0 (max 9); favorable false

Maximum published score

Given: dilation=3effacement=3station=3

dilation 3 + station 3 + effacement 3
Score = 9 (max 9); favorable true

Also searched as

simplified Bishop score
Laughon simplified Bishop
Laughon 2011 Bishop
simplified pelvic score
Bishop dilation station effacement
simplified Bishop vaginal delivery
three-component Bishop
Laughon Bishop score

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/simplified_bishop?dilation=3&station=2&effacement=2

Full URL: https://api.magentlab.com/api/calc/simplified_bishop?dilation=3&station=2&effacement=2

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge.

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/simplified_bishop?dilation=3&station=2&effacement=2"

Parameters

Name	Type	Required	Description
`dilation`	integer	required	Caller-assigned Bishop 1964 dilation points 0-3 (paper bins: 0 cm → 0; 1-2 cm → 1; 3-4 cm → 2; 5-6 cm → 3). magent does not measure dilation.
`station`	integer	required	Caller-assigned Bishop 1964 station points 0-3 (paper bins: -3 → 0; -2 → 1; -1 or 0 → 2; +1 or +2 → 3). magent does not assign station.
`effacement`	integer	required	Caller-assigned Bishop 1964 effacement points 0-3 (paper bins: 0-30% → 0; 40-50% → 1; 60-70% → 2; 80% → 3). magent does not measure effacement.

Bulk (POST)

POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement.

POST /api/calc/simplified_bishop Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 PREVIEW

1 to 25 items. Each item uses the same keys as the GET query parameters.
POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows.
The first invalid item fails the whole request (index in the 400 JSON). You are not charged.
HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row.
Catalog misses (empty matches, found=false) stay paid 200s inside that slot.
x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items.

Example request (fixture)

{
  "items": [
    {
      "dilation": "3",
      "effacement": "2",
      "station": "2"
    },
    {
      "dilation": "3",
      "effacement": "2",
      "station": "2"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/simplified_bishop",
  "items": [
    {
      "components": [
        {
          "value": 3,
          "factor": "dilation",
          "points": 3,
          "present": true
        },
        {
          "value": 2,
          "factor": "station",
          "points": 2,
          "present": true
        },
        {
          "value": 2,
          "factor": "effacement",
          "points": 2,
          "present": true
        }
      ],
      "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
      "citation": {
        "authors": "Laughon SK, Zhang J, Troendle J, Sun L, Reddy UM",
        "doi": "10.1097/AOG.0b013e3182114ad2",
        "id": "laughon-2011",
        "pmid": "21383643",
        "source": "Obstet Gynecol. 2011;117(4):805-811",
        "title": "Using a simplified Bishop score to predict vaginal delivery"
      },
      "formula": "simplified_bishop",
      "formula_expression": "simplified Bishop = dilation + station + effacement; Bishop 1964 caller-assigned integers 0-3, 0-3, 0-3; Laughon 2011; max 9; favorable iff score > 5",
      "max_score": 9,
      "score": 7,
      "favorable": true
    },
    {
      "components": [
        {
          "value": 3,
          "factor": "dilation",
          "points": 3,
          "present": true
        },
        {
          "value": 2,
          "factor": "station",
          "points": 2,
          "present": true
        },
        {
          "value": 2,
          "factor": "effacement",
          "points": 2,
          "present": true
        }
      ],
      "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
      "citation": {
        "authors": "Laughon SK, Zhang J, Troendle J, Sun L, Reddy UM",
        "doi": "10.1097/AOG.0b013e3182114ad2",
        "id": "laughon-2011",
        "pmid": "21383643",
        "source": "Obstet Gynecol. 2011;117(4):805-811",
        "title": "Using a simplified Bishop score to predict vaginal delivery"
      },
      "formula": "simplified_bishop",
      "formula_expression": "simplified Bishop = dilation + station + effacement; Bishop 1964 caller-assigned integers 0-3, 0-3, 0-3; Laughon 2011; max 9; favorable iff score > 5",
      "max_score": 9,
      "score": 7,
      "favorable": true
    }
  ]
}

Response

Field	Type	Description
`formula`	string	simplified_bishop
`formula_expression`	string	Exact expression used
`score`	integer	Total points 0-9
`max_score`	integer	Always 9
`favorable`	boolean	true iff score >5 (Laughon 2011 compared simplified >5 with original Bishop >8; PPV 87.7% in that paper). Score of 5 is not favorable. Not an induction order.
`components`	array	Per-component caller-assigned points
`citation`	object	Laughon 2011 citation
`disclaimer`	string	Not a medical device

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup.

{
  "components": [
    {
      "value": 3,
      "factor": "dilation",
      "points": 3,
      "present": true
    },
    {
      "value": 2,
      "factor": "station",
      "points": 2,
      "present": true
    },
    {
      "value": 2,
      "factor": "effacement",
      "points": 2,
      "present": true
    }
  ],
  "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
  "citation": {
    "authors": "Laughon SK, Zhang J, Troendle J, Sun L, Reddy UM",
    "doi": "10.1097/AOG.0b013e3182114ad2",
    "id": "laughon-2011",
    "pmid": "21383643",
    "source": "Obstet Gynecol. 2011;117(4):805-811",
    "title": "Using a simplified Bishop score to predict vaginal delivery"
  },
  "formula": "simplified_bishop",
  "formula_expression": "simplified Bishop = dilation + station + effacement; Bishop 1964 caller-assigned integers 0-3, 0-3, 0-3; Laughon 2011; max 9; favorable iff score > 5",
  "max_score": 9,
  "score": 7,
  "favorable": true
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

HTTP	Code	When
400	`invalid_simplified_bishop`	Simplified Bishop inputs must be caller-assigned integers in the Bishop 1964 0-3 range for dilation, station, and effacement. Returned before settlement; you are not charged.
400	`invalid_items`	POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400	`invalid_item_count`	items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400	`invalid_item`	each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

Bishop score — Return the Bishop 1964 pelvic score as the sum of five caller-assigned integer components (dilation, effacement, station, consistency, position).

Payment

Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /docs/mcp.

Guarantees

HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. HTTP 402 never includes the tool JSON.
exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE.
HTTP 402 is unpaid only. Do not sign a second authorization because of a 503.
Execution is timeout-bounded and concurrency-capped.
Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.