Bishop Score Calculator - Pre-Induction 0 To 13 Total

A bishop score calculator turns the 1964 Edward Bishop pre-induction cervical scoring system into a 0 to 13 total from five components (cervical position, consistency, effacement, dilation, and fetal station), paired with the Unfavorable to Favorable band and the 8 or higher induction threshold.

• • Pre-induction cervical assessment: score the cervix and fetal station near the due date, read the 0 to 13 total, and document the Unfavorable to Favorable band before a planned induction.
• • Induction-likelihood flag: compare the total to the Tenore 2003 8-or-higher threshold and flag the cases where a likely successful induction is expected.
• • Cervical ripening decision: use the total to decide whether cervical ripening with prostaglandins or a mechanical option is needed before induction, and document the team decision.

The 1964 pelvic scoring system scores the cervix and the fetal station on the same 0 to 13 table, with a higher total indicating a more favorable cervix and a higher likelihood of successful induction.

A bishop score of 8 or higher is the published threshold for a likely successful labor induction per the Tenore 2003 American Family Physician review and the Williams Obstetrics textbook. The decision to induce sits with the obstetric team and the patient.

The cervical assessment is usually taken near the due date that the Pregnancy Due Date Calculator estimates, and a 36 week or later assessment is the typical window for pre-induction cervical scoring.

The bishop score calculator scores each of the 1964 five components from the published 0 to 2 or 0 to 3 table, sums them to a 0 to 13 total, and maps the total to the Unfavorable (0 to 5), Less favorable (6 to 7), or Favorable (8 to 13) band, with the 8 or higher induction-likelihood flag from the Tenore 2003 review.

• Cervical position: where the cervix sits in the vaginal canal: posterior (0), middle (1), or anterior (2). The position moves anterior as labor becomes closer.
• Cervical consistency: how the cervix feels on manual exam: firm (0), medium (1), or soft (2).
• Cervical effacement: thinning of the cervix as a percentage: 0 to 30% (0), 40 to 50% (1), 60 to 70% (2), or 80% or higher (3).
• Cervical dilation: opening of the cervical os in centimeters: closed (0), 1 to 2 cm (1), 3 to 4 cm (2), or 5 cm or more (3). Full dilation is 10 cm.
• Fetal station: position of the fetal head relative to the ischial spines: -3 (0), -2 (1), -1 or 0 (2), or +1 or +2 (3).

Each component is scored on the published 1964 table, the five contributions are summed to a 0 to 13 total, and the total is mapped to the Unfavorable, Less favorable, or Favorable band.

When the total is at or above 8, the form flags the Tenore 2003 8-or-higher threshold. Below 8, the form recommends cervical ripening or expectant management per the same review.

According to Bishop EH, Obstet Gynecol 1964, the pre-induction pelvic score is the sum of five components (cervical position, consistency, effacement, dilation, and fetal station) each scored from a 0 to 2 or 0 to 3 table, for a total range of 0 to 13, with a higher total indicating a more favorable cervix and a higher likelihood of successful induction. The Tenore 2003 American Family Physician review restates the same five components and pairs them with the 0 to 5 Unfavorable, 6 to 7 Less favorable, and 8 to 13 Favorable interpretation bands used on this page.

The pelvic scoring is normally calculated only after 36 weeks, and the Gestational Age Calculator returns the same completed weeks plus days so the obstetric team can confirm the patient is in the assessment window.

Four concepts drive the result. Naming them keeps the total from being read as a single number, which it is not.

The total is built from five components, not a single number. The cervical status carries the most weight, the fetal station carries the second most, and the band is the smallest signal.

A successful induction with a favorable cervical total ends in a newborn assessment, and the Apgar Score Calculator returns the same 0 to 10 Apgar total at 1 and 5 minutes from the five 1952 Apgar categories.

The form works from the 1964 pelvic scoring table. Each of the five components is scored 0 to 2 or 0 to 3 on a manual vaginal exam, and the form returns the 0 to 13 total, the Unfavorable to Favorable band, and the 8 or higher induction-likelihood flag.

1. 1 Score the cervical position: pick the row that matches the position of the cervix in the vaginal canal: posterior (0), middle (1), or anterior (2).
2. 2 Score the cervical consistency: pick the row that matches how the cervix feels on manual exam: firm (0), medium (1), or soft (2).
3. 3 Score the effacement and dilation: pick the effacement row and the dilation row from the published 1964 table.
4. 4 Score the fetal station: pick the row that matches the position of the fetal head relative to the ischial spines: -3 (0), -2 (1), -1 or 0 (2), or +1 or +2 (3).
5. 5 Read the total and the band: the form returns the 0 to 13 total and the Unfavorable, Less favorable, or Favorable band, with the 8-or-higher Tenore 2003 induction-likelihood flag.

A cervix that is anterior 2, soft 2, 80% or more effaced 3, 5 cm or more dilated 3, and at station +1 or +2 = 3 returns a pelvic total of 13 (Favorable) and a likely-successful-induction flag because the total is at or above 8.

Calculating the total from the 1964 five-component table has practical benefits over running the 1964 pelvic scoring system by hand.

• • 1964 table, one form: a single form scores all five components, sums them to a 0 to 13 total, and returns the Unfavorable to Favorable band for the documented pre-induction assessment.
• • Induction-likelihood flag built in: the form returns the Tenore 2003 8-or-higher induction-likelihood flag, matching the published 1964 paper and the Williams Obstetrics textbook.
• • Cervical ripening decision: the form returns the Less favorable (6 to 7) and Unfavorable (0 to 5) bands that guide the choice of cervical ripening with prostaglandins or a mechanical option before induction.
• • Teaching reference: the form walks a learner through the 1964 pelvic scoring table without re-deriving the 0 to 2 and 0 to 3 scoring by hand, with the Call PEDS for Parturition mnemonic.

The same form works for a pre-induction documentation entry and for a teaching reference that walks through the 1964 pelvic scoring system without re-deriving the 0 to 13 table by hand.

The cervical assessment sits inside the broader pregnancy timeline, and the Pregnancy Calculator returns the same current week and trimester alongside the cervical assessment.

Several factors shape the total. The most important ones sit inside the entered form, and a small set of caveats belong outside the form.

• • The cervical assessment is a pre-induction planning tool, not a promise of a specific outcome. The assessment is performed by a trained clinician, and a favorable total does not by itself predict a vaginal delivery. The decision to induce sits with the obstetric team and the patient.
• • Confounders such as maternal parity, gestational age, prior cervical surgery, and the indication for induction can change the total. The clinical interpretation sits with the obstetric team.

A total of 8 or higher is the published Tenore 2003 threshold for a likely successful labor induction, and a total below 8 is the threshold for cervical ripening or expectant management.

According to Tenore JL, Am Fam Physician 2003, a Bishop score of 0 to 5 is Unfavorable, 6 to 7 is Less favorable, and 8 to 13 is Favorable, and a score of 8 or higher is the published threshold for a likely successful labor induction.

Maternal weight gain is one of the modifiers that the obstetric team reads alongside this assessment, and the Pregnancy Weight Gain Calculator returns the same per-trimester weight-gain target from the pre-pregnancy BMI.