Teratogenic Index Calculator
Explicit teratogenic-index maternal/developmental endpoint dose ratio under independently compatible assay/species conventions, not a universal definition or human fetal-risk probability. Actual independently matched quantities/units required; not infer causal effect, clinical guidance or safe design.
Description
A teratogenic-index convention can compare matched maternal and developmental endpoint doses.
A teratogenic-index convention can compare matched maternal and developmental endpoint doses.1
The direction and endpoint definitions of that ratio must be stated explicitly.
When to use Teratogenic Index Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Establish the chemical, exposure route, endpoint, measurement basis and independently applicable assay or assessment reference.
How to use Teratogenic Index Calculator and understand its results
- Establish the chemical, exposure route, endpoint, measurement basis and independently applicable assay or assessment reference.
- Enter independentlyQualifiedMaternalToxicEndpointDose, matchedDevelopmentalToxicEndpointDose, using the field meanings and rules below, then run the tool.
- Read result.observedRatio. Use the units and subtraction order below to interpret each value; retain negative differences where returned.
- 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 |
|---|---|---|---|
| independentlyQualifiedMaternalToxicEndpointDose | Independently qualified maternal toxic endpoint dose | number | Required |
| matchedDevelopmentalToxicEndpointDose | Matched developmental toxic endpoint dose | number | Required |
Require a finite nonnegative numerator and strictly positive denominator. Divide the supplied measurements without converting their units or clamping the result. The implementation does not enforce numerator≤denominator, so a ratio above one can be returned. Use independently compatible definitions and units.
observedRatio=numerator/denominator Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Qualified observed calculation or explicit reference | object |
| result.observedRatio | Declared numerator divided by matched denominator on the stated compatible basis; no upper-one clamp. | number |
{
"input": {
"independentlyQualifiedMaternalToxicEndpointDose": 2,
"matchedDevelopmentalToxicEndpointDose": 4
},
"output": {
"result": {
"observedRatio": 0.5
}
}
}Limitations and assumptions
Chemical identity, route, assay, exposure basis and reference applicability are caller-established. The output supplies no causal conclusion, universal toxicity threshold or authoritative regulatory determination.
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 Hershberger Assay Calculator: A Hershberger tissue-weight comparison uses independently identified tissues and matched body masses under a stated assay. For a complementary comparison, use Uterotrophic Endocrine Disruption Calculator: A uterotrophic comparison relates independently measured uterine mass to matched body mass and control context.
References
-
Teratogenic Index Calculator — tool.io
Similar or alternative tools
- Hershberger Assay Calculator
A Hershberger tissue-weight comparison uses independently identified tissues and matched body masses under a stated assay.
- Uterotrophic Endocrine Disruption Calculator
A uterotrophic comparison relates independently measured uterine mass to matched body mass and control context.