EthinylestradiolNomegestrolQualityChecker

Ethinylestradiol Nomegestrol

assay contraceptives dissolution fixed-dose combinations heavy metals hormones impurities microbiology
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Ethinylestradiol + Nomegestrol Acetate Quality Checker — Combined Tablets (Zoely) (Ph. Eur., ICH Q6A)

ℹ️ The utility checks content of both active substances, impurities (17-epimer EE, 17-epi and 3-keto nomegestrol acetate), weight variation, disintegration, dissolution, microbiology (including pathogens), friability.
ℹ️ Does not use machine learning — rule-based logic only.
⚠️ Critical for COC production (Zoely). Strict nomegestrol acetate impurity control is mandatory due to impact on progestogenic activity and safety profile!

Usage:
EthinylestradiolNomegestrolQualityChecker.exe → demo mode (console output)
EthinylestradiolNomegestrolQualityChecker.exe input.csv output.json → evaluate your data

Input format:
BatchNumber,EthinylestradiolContent,NomegestrolAcetateContent,ImpurityEthinylestradiol,Impurity17EpiNomegestrol,Impurity3KetoNomegestrol,TotalImpuritiesNomegestrol,WeightVariationRSD,DisintegrationTime,DissolutionEthinylestradiol,DissolutionNomegestrol,HeavyMetals,TAMC,TYMC,EColiDetected,SalmonellaDetected,EthanolPPM,AcetonePPM,Friability

Example (EColiDetected/SalmonellaDetected: 0=not detected, 1=detected):
EENA-2026-001,98.5,99.2,0.3,0.2,0.1,0.4,3.5,15.0,85.0,87.0,10,500,50,0,0,800,500,0.6

— WHY IS THIS NEEDED?
Combined tablets (ethinylestradiol + nomegestrol acetate) — modern COCs with improved safety profile for:
• Contraception (Zoely — with low EE dose 15 mcg)
• Acne and seborrhea treatment in women
• Menstrual cycle regulation with minimal impact on lipid profile
⚠️ CRITICAL:
• Dissolution of both components ≥80% — ensures bioavailability and contraceptive efficacy
• EE impurity (17-epimer) ≤0.5% — affects estrogenic activity
• 17-Epi-nomegestrol acetate ≤0.5% — stereoisomer, reduces progestogenic activity
• 3-Keto-nomegestrol acetate ≤0.5% — oxidation product, critical for stability
• Total nomegestrol acetate impurities ≤1.0% — especially important due to high selectivity of nomegestrol to progesterone receptors
• Absence of pathogens (E. coli, Salmonella) — mandatory for oral preparations
⚠️ Special attention: Nomegestrol acetate — highly selective progestogen without androgenic, glucocorticoid, or mineralocorticoid activity. Impurities can disrupt this unique profile! 17-Epi isomer impurities are especially critical — affect selectivity to progesterone receptors.
Critical parameters:
• EE content: 90.0–110.0% of declared
• Nomegestrol acetate content: 90.0–110.0% of declared
• EE impurity (17-epimer): ≤0.5%
• 17-Epi-nomegestrol acetate: ≤0.5%
• 3-Keto-nomegestrol acetate: ≤0.5%
• Total nomegestrol acetate impurities: ≤1.0%
• Weight variation (RSD): ≤5.0%
• Disintegration: ≤30 minutes
• EE dissolution: ≥80% (at 30 min)
• Nomegestrol acetate dissolution: ≥80% (at 30 min)
• Heavy metals: ≤20 ppm
• Microbiology: TAMC ≤1000 CFU/g, TYMC ≤100 CFU/g
• Absence of E. coli and Salmonella
• Friability: ≤1.0% (for uncoated tablets)
• Residual solvents: ethanol ≤5000 ppm, acetone ≤5000 ppm
⚠️ Note: Nomegestrol acetate is sensitive to oxidation and light! Requires storage in light-protected packaging at temperature not exceeding 25°C. Analysis must be performed under light-protected conditions! Dissolution is tested separately for each component (different HPLC methods).

input.csv

BatchNumber,EthinylestradiolContent,NomegestrolAcetateContent,ImpurityEthinylestradiol,Impurity17EpiNomegestrol,Impurity3KetoNomegestrol,TotalImpuritiesNomegestrol,WeightVariationRSD,DisintegrationTime,DissolutionEthinylestradiol,DissolutionNomegestrol,HeavyMetals,TAMC,TYMC,EColiDetected,SalmonellaDetected,EthanolPPM,AcetonePPM,Friability
EENA-2026-001,98.5,99.2,0.3,0.2,0.1,0.4,3.5,15.0,85.0,87.0,10,500,50,0,0,800,500,0.6

URS & FS — user requirements and functional specification

This document defines user requirements and functional specification for the quality-control utility. It supports deployment discussion, IQ/OQ preparation and QC workflow integration.

Utility: EthinylestradiolNomegestrolQualityCheckerAPI / object: Ethinylestradiol NomegestrolCategory: Contraceptives

1. Scope

The Ethinylestradiol Nomegestrol Quality Checker utility is used for Ethinylestradiol Nomegestrol. The actual input.csv is the source of truth for the input structure; control criteria are defined by the executable and the domain description.

The utility does not use machine learning; decisions are produced by deterministic rules.

Categories: Contraceptives

Tags: assay, contraceptives, dissolution, fixed-dose combinations, heavy metals, hormones, impurities, microbiology, minerals, radiopharma, residual solvents, solid dosage

2. Execution modes

EthinylestradiolNomegestrolQualityChecker.exe                            → demo mode (console output)
EthinylestradiolNomegestrolQualityChecker.exe input.csv output.json      → evaluate your data

3. Key controlled areas

  • assay / content
  • purity and impurities
  • dissolution / disintegration
  • residual solvents
  • microbiology and pathogens
  • heavy metals / elemental impurities
  • pH and physicochemical parameters

4. Domain limits and critical parameters

  • ⚠️ Critical for COC production (Zoely). Strict nomegestrol acetate impurity control is mandatory due to impact on progestogenic activity and safety profile!
  • ⚠️ CRITICAL:
  • Dissolution of both components ≥80% — ensures bioavailability and contraceptive efficacy
  • EE impurity (17-epimer) ≤0.5% — affects estrogenic activity
  • 17-Epi-nomegestrol acetate ≤0.5% — stereoisomer, reduces progestogenic activity
  • 3-Keto-nomegestrol acetate ≤0.5% — oxidation product, critical for stability
  • Total nomegestrol acetate impurities ≤1.0% — especially important due to high selectivity of nomegestrol to progesterone receptors
  • Absence of pathogens (E. coli, Salmonella) — mandatory for oral preparations
  • ⚠️ Special attention: Nomegestrol acetate — highly selective progestogen without androgenic, glucocorticoid, or mineralocorticoid activity. Impurities can disrupt this unique profile! 17-Epi isomer impurities are especially critical — affect selectivity to progesterone receptors.
  • Critical parameters:
  • EE content: 90.0–110.0% of declared
  • Nomegestrol acetate content: 90.0–110.0% of declared
  • EE impurity (17-epimer): ≤0.5%
  • 17-Epi-nomegestrol acetate: ≤0.5%
  • 3-Keto-nomegestrol acetate: ≤0.5%
  • Total nomegestrol acetate impurities: ≤1.0%
  • Weight variation (RSD): ≤5.0%
  • Disintegration: ≤30 minutes
  • EE dissolution: ≥80% (at 30 min)
  • Nomegestrol acetate dissolution: ≥80% (at 30 min)
  • Heavy metals: ≤20 ppm
  • Microbiology: TAMC ≤1000 CFU/g, TYMC ≤100 CFU/g
  • Absence of E. coli and Salmonella
  • Friability: ≤1.0% (for uncoated tablets)
Limits stated in the description must be verified against the current approved specification, pharmacopoeial monograph and registration dossier before production use.

5. URS — user requirements

IDRequirementCriticalityAcceptance criterion
URS-001The system shall accept an input.csv file for Ethinylestradiol Nomegestrol with the exact columns listed in the “Input data contract” section.HighA file with the correct header is processed without manual editing; missing mandatory columns produce FAIL/import error.
URS-002The system shall support execution without arguments in demo mode and execution with input.csv output.json for user data.MediumBoth execution scenarios produce a predictable result or clear diagnostic error.
URS-003The system shall perform rule-based controls for: assay / content, purity and impurities, dissolution / disintegration, residual solvents, microbiology and pathogens, heavy metals / elemental impurities, pH and physicochemical parameters.HighEach controlled parameter receives a status and message; the result does not depend on hidden Excel formulas or ML.
URS-004The system shall preserve traceability between batch/lot, source values, applied rules and final verdict.HighOutput includes batch identifier, source values, parameter statuses and critical findings.
URS-005The system shall generate machine-readable output.json for LIMS/ELN/MES, batch record and QA/QC review.HighJSON contains overall status, check array, warnings, failures and source-file reference.
URS-006The system shall support use in the client validation package: URS/FS, IQ/OQ preparation, installation and operational scenario checks.HighThe document, test scenarios and reproducible CSV/JSON flow are suitable for audit and internal approval.
URS-007The system shall clearly separate technical data errors from specification nonconformities.MediumSchema/type errors are not mixed with pharmacopoeial deviations and are reported separately.

6. input.csv data contract

The source of truth for the input schema is the actual input.csv header. Column names are technical identifiers and are not translated.

#ColumnTypeUnitDescriptionSampleControl rule
1BatchNumberidentifieras specifiedBatch NumberEENA-2026-001mandatory field; used for batch/lot traceability
2EthinylestradiolContentdecimalas specifiedEthinylestradiol Content98.5numeric value; compared with assay/purity limit from specification or method
3NomegestrolAcetateContentdecimalas specifiedNomegestrol Acetate Content99.2numeric value; compared with assay/purity limit from specification or method
4ImpurityEthinylestradioldecimalas specifiedImpurity Ethinylestradiol0.3numeric value; compared with individual or total impurity limit
5Impurity17EpiNomegestroldecimalas specifiedImpurity17 Epi Nomegestrol0.2numeric value; compared with individual or total impurity limit
6Impurity3KetoNomegestroldecimalas specifiedImpurity3 Keto Nomegestrol0.1numeric value; compared with individual or total impurity limit
7TotalImpuritiesNomegestroldecimalas specifiedTotal Impurities Nomegestrol0.4mandatory numeric value; rule comparison is performed by the utility
8WeightVariationRSDdecimalas specifiedWeight Variation RSD3.5mandatory numeric value; rule comparison is performed by the utility
9DisintegrationTimedecimalminDisintegration Time15.0numeric value; dissolution/disintegration profile checked according to method
10DissolutionEthinylestradioldecimalas specifiedDissolution Ethinylestradiol85.0numeric value; dissolution/disintegration profile checked according to method
11DissolutionNomegestroldecimalas specifiedDissolution Nomegestrol87.0numeric value; dissolution/disintegration profile checked according to method
12HeavyMetalsdecimalas specifiedHeavy Metals10numeric value; checked as elemental/metal impurity
13TAMCdecimalas specifiedTAMC500numeric value; compared with microbiological limits
14TYMCdecimalas specifiedTYMC50numeric value; compared with microbiological limits
15EColiDetectedboolean / flag0/1EColi Detected0valid flag required; prohibited organisms and growth are normally expected as 0 / absent
16SalmonellaDetectedboolean / flag0/1Salmonella Detected0valid flag required; prohibited organisms and growth are normally expected as 0 / absent
17EthanolPPMdecimalppmEthanol PPM800numeric value; checked as residual solvent against the applicable limit
18AcetonePPMdecimalppmAcetone PPM500numeric value; checked as residual solvent against the applicable limit
19Friabilitydecimalas specifiedFriability0.6mandatory numeric value; rule comparison is performed by the utility

CSV example

BatchNumber,EthinylestradiolContent,NomegestrolAcetateContent,ImpurityEthinylestradiol,Impurity17EpiNomegestrol,Impurity3KetoNomegestrol,TotalImpuritiesNomegestrol,WeightVariationRSD,DisintegrationTime,DissolutionEthinylestradiol,DissolutionNomegestrol,HeavyMetals,TAMC,TYMC,EColiDetected,SalmonellaDetected,EthanolPPM,AcetonePPM,Friability
EENA-2026-001,98.5,99.2,0.3,0.2,0.1,0.4,3.5,15.0,85.0,87.0,10,500,50,0,0,800,500,0.6

7. FS — functional specification

IDFunctionImplementation description
FS-001CLI entry pointThe executable EthinylestradiolNomegestrolQualityChecker.exe supports demo mode and input.csv output.json processing mode.
FS-002CSV parserThe import module reads CSV, validates header, column presence/order, value count and encoding. Decimal values are expected with a dot separator.
FS-003Field conversionEach column is converted to the expected type: identifier, text, decimal number, date/time or boolean flag.
FS-004Domain rule engineFor Ethinylestradiol Nomegestrol, explicit rules are applied: range, minimum, maximum, absence of prohibited flag, data completeness or calculation-based check.
FS-005Criticality handlingCritical violations produce FAIL; non-critical deviations and incomplete data produce WARNING; full conformance produces PASS.
FS-006JSON writeroutput.json stores overall status, per-parameter results, source values, warnings, failures and diagnostic messages.
FS-007Integration contractThe CSV → JSON format is stable for invocation from LIMS/ELN/MES, scheduled task or wrapper service.
FS-008Error handlingSchema error, missing file, non-numeric value or JSON write failure returns diagnosable error without silent PASS.

8. output.json contract

The output file must be suitable for automated processing, audit review and correlation with the source input.csv row.

{
  "utility": "EthinylestradiolNomegestrolQualityChecker",
  "api": "Ethinylestradiol Nomegestrol",
  "batchNumber": "EENA-2026-001",
  "overallStatus": "PASS|WARNING|FAIL",
  "checkedAtUtc": "2026-05-18T00:00:00Z",
  "checks": [
    {
      "parameter": "BatchNumber",
      "value": "EENA-2026-001",
      "unit": "as specified",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "EthinylestradiolContent",
      "value": "98.5",
      "unit": "as specified",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "NomegestrolAcetateContent",
      "value": "99.2",
      "unit": "as specified",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "ImpurityEthinylestradiol",
      "value": "0.3",
      "unit": "as specified",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "Impurity17EpiNomegestrol",
      "value": "0.2",
      "unit": "as specified",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "Impurity3KetoNomegestrol",
      "value": "0.1",
      "unit": "as specified",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "TotalImpuritiesNomegestrol",
      "value": "0.4",
      "unit": "as specified",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    },
    {
      "parameter": "WeightVariationRSD",
      "value": "3.5",
      "unit": "as specified",
      "status": "PASS|WARNING|FAIL",
      "message": "Rule-based check result"
    }
  ],
  "criticalFindings": [],
  "sourceFile": "input.csv"
}

9. OQ/PQ test scenarios

IDScenarioExpected result
TC-001Valid CSV with expected header and sample rowAll rows are processed; output contains PASS/WARNING/FAIL and parameter-level detail.
TC-002A mandatory input.csv column is missingImport is rejected or the row receives FAIL with schema reference.
TC-003A numeric field contains text or a blank valueType conversion error is recorded; the result is not hidden as PASS.
TC-004A parameter is outside specification or critical limitCritical parameters produce FAIL; non-critical deviations produce WARNING according to the rule.
TC-005Positive pathogen/microbiological flag or microbiological limit excursionCritical FAIL is produced with the offending parameter.
TC-006Insufficient dissolution or excessive disintegration timeFAIL/WARNING is produced according to method criticality.
TC-007Residual solvent above applicable limitFAIL is produced with solvent name and measured value.

10. QA/QC, CSV and change control

  • Before production use, the client records executable version, checksum, specification/monograph version, test CSV, expected JSON and IQ/OQ results.
  • Column names must not be changed without updating the validator and test scenarios.
  • The source CSV, output.json and utility version should be stored together as an evidence package.
  • Any change in control rules must go through change control and repeated OQ scenario verification.

Included in packages

Cardiology QC Suite

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Contraceptives QC Suite

Quality-control package for contraceptives: hormonal APIs, fixed combinations, implants, rings and intrauterine systems.

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Endocrinology QC Suite

QC package for endocrinology: thyroid, pituitary/peptide hormones, corticosteroids, sex hormones and selected metabolic medicines.

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Gynecology QC Suite

QC package for gynecology: hormones, contraceptives, uterotonics, anti-infectives and women’s-health medicines.

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Radiology QC Suite

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