Fetal Position Lookup

Bounded offline reference: Fetal position specifies the orientation of a clinically identified reference landmark within maternal pelvic convention. Source: Obstetric anatomical terminology. No automatic examination, delivery recommendation or safe-management conclusion. Explicit topic keys: occiput, sacrum, mentum. Not a full/current corpus, diagnosis, treatment recommendation or safety certification.

Description

Fetal position uses a reference landmark to describe orientation within a presentation.

Fetal position uses a reference landmark to describe orientation within a presentation.^[1]

Occiput, sacrum and mentum belong to different presentation nomenclatures.

When to use Fetal Position Lookup

Use this tool to read a bounded explanation for an exact reference topic. Establish the observation date, units, measurement context and independently applicable clinical reference or calibrated model.

How to use Fetal Position Lookup and understand its results

Establish the observation date, units, measurement context and independently applicable clinical reference or calibrated model.
Enter topic, using the field meanings and rules below, then run the tool.
Read result.text. Use the units and sign conventions below.
Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.

Input field	Meaning	Value type	Requirement
topic	Topic	string	Required

Choose one exact topic token from the table. The implementation looks up the stored value and returns it in the documented output field. Matching is case-sensitive; unrecognized tokens fail. This is an offline bounded reference, not a live catalogue or independent attribution.

Topic token	Stored value
occiput	Cephalic occiput orientation is distinct from head presentation itself.
sacrum	Sacrum is a reference landmark in breech position nomenclature.
mentum	Mentum is a reference landmark in face presentation nomenclature.

value=referenceTable[exactToken]

Use the matching field units and the exact boundary, ordering and reference rules above.

Output field	Meaning	Value type
result	Structured result; its nested fields below contain the actual calculation or selected reference	object
result.text	Text	string

json

{
  "input": {
    "topic": "occiput"
  },
  "output": {
    "result": {
      "text": "Cephalic occiput orientation is distinct from head presentation itself."
    }
  }
}

Limitations and assumptions

Dating evidence, acquisition conditions and applicable clinical references remain independently established. The output describes supplied observations or a conditional model without diagnosing an outcome, choosing a dose or verifying clinical applicability.

Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.

Alternative or Complementary methods

For a related step, use Fetal Head Station Calculator: Fetal-head station describes the assessed level relative to the ischial-spine reference plane. For a complementary comparison, use Fetal Presentation Lookup: Fetal presentation names the part presented toward the birth canal.

References

Fetal Position Lookup — tool.io

Similar or alternative tools

Fetal Head Station Calculator
Fetal-head station describes the assessed level relative to the ischial-spine reference plane.
Fetal Presentation Lookup
Fetal presentation names the part presented toward the birth canal.