Description
Compare explicit research gestational-day coordinates without dating a pregnancy or recommending care.
Pregnancy and birth research records distinguish observed and estimated values, dating anchors, day coordinates, time precision, clock offsets, and source permissions. A notation conversion or interval comparison does not determine a clinical date or validate consent. The supplied reference convention and uncertainty need to remain visible.
Compare explicit research gestational-day coordinates without dating a pregnancy or recommending care.
When to use this tool
Use Gestational Reference Day Gap when you need this supplied research age, date, interval, clock, provenance, or record-rule calculation.
How to use the tool and how it works
- Enter suppliedDays, referenceDays. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read gap. Use the output convention below.
For nonnegative suppliedDays and referenceDays return gap=suppliedDays-referenceDays.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| suppliedDays | Supplied Days | Required. Finite number; minimum 0. |
| referenceDays | Reference Days | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| gap | Signed difference under the stated formula. | Required. Finite number. |
{
"input": {
"suppliedDays": 200,
"referenceDays": 196
},
"output": {
"gap": 4
}
}Limitations and assumptions
- Fractional day values are permitted. The reference and age basis are supplied rather than clinically selected; no calendar parsing, gestational-age assessment, or pregnancy recommendation is performed.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use verified dates and sources together with the intended research or clinical assessment process. Check dating anchors, clock conventions, uncertainty, and whether a supplied reporting rule is appropriate for the question.
References
Similar or alternative tools
- Research Gestational Day Offset
Apply a supplied research day-anchor offset without pregnancy dating or clinical assessment.
- Gestational Source Age Gap
Compare explicitly supplied research age records and civil-date elapsed time; no dating or care rule.