# Laughon simplified Bishop score

simplified Bishop score

Status: LIVE
Price: $0.005 USDC
`GET /api/calc/simplified_bishop`
HTML: https://magentlab.com/docs/simplified-bishop
Markdown: https://magentlab.com/docs/simplified-bishop.md

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

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

## Worked example

### Dilation 3, station 2, effacement 2

Given: `dilation=3, effacement=2, station=2`

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


### All zeros

Given: `dilation=0, effacement=0, station=0`

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


### Maximum published score

Given: `dilation=3, effacement=3, station=3`

1. dilation 3 + station 3 + effacement 3
2. 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

## Parameters

- `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.

Method: `POST /api/calc/simplified_bishop`
Max items: 25
Price: unit_amount + extra_item_amount * (n - 1) (unit 5000 atomic, extra 2000 atomic)
Status: 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:

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

Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/simplified-bishop

Example 200:

```json
{
  "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 fields

- `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

Frozen fixture. Not a live lookup.

```json
{
  "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
}
```

## Errors

- HTTP 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.
- HTTP 400 `invalid_items`: POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
- HTTP 400 `invalid_item_count`: items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
- HTTP 400 `invalid_item`: each items entry must be a JSON object Returned before settlement; you are not charged.

Shared HTTP 402 and 503: https://magentlab.com/docs/payments

## Related tools

- [Bishop score](https://magentlab.com/docs/bishop) — 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.

- GET the tool with Accept: application/json (do not send Accept: text/html unless you want the human paywall).
- HTTP 402 means you have not paid. Decode the base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote.
- Sign accepts[0] (exact, EIP-3009) with validBefore = now + maxTimeoutSeconds (600 seconds), or accepts[1] (batch-settlement deposit/voucher) on product GET. Ping and POST {items} stay exact. Magent retries transient facilitator 429/5xx before answering.
- Retry the same URL with PAYMENT-SIGNATURE (base64 JSON of accepted and payload). Magent attaches canonical extensions.bazaar on CDP verify/settle; echoing 402 bazaar is optional.
- Success is HTTP 200 JSON plus PAYMENT-RESPONSE. exact settles before the tool. batch-settlement verifies (and deposit-settles) before the tool and commits the charge after HTTP 2xx. HTTP 503: retry the same PAYMENT-SIGNATURE. Mint a new exact nonce only after a new HTTP 402.

- offered `exact` on eip155:8453: Fixed-price USDC on Base. The buyer authorizes the advertised amount (EIP-3009). magent settles before the tool runs (paymentFlow upfront). extra.assetTransferMethod=eip3009 extra.paymentFlow=upfront.
- offered `batch-settlement` on eip155:8453: Payment-channel vouchers claimed later in batches. Exact stays accepts[0]. Same-path POST {items} is still exact. extra.assetTransferMethod=eip3009 extra.paymentFlow=authorization.

- not offered `upto`: Not offered. Usage-based: buyer authorizes a ceiling, seller settles the actual amount after work. Reserved for a future metered tool. Not for current calculators or code search.

Same-path POST {items} is still scheme exact: one EIP-3009 authorization for GET unit plus $0.002 per extra item. That is not x402 batch-settlement (payment channels / vouchers).

Shared HTTP 402 and 503 table: https://magentlab.com/docs/payments

Stdio MCP (one process per host): https://magentlab.com/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.