Arithmétique provisoire de la DPA et de l’âge gestationnel

État

clinical-review-pending

Version de la méthode

Source-locked civil-date arithmetic, engine estimated-due-date-civil-day-arithmetic-v1 reviewed 2026-08-13, with exactly one of two bases. Provisional-LMP mode requires the explicit first civil day of a certain normal LMP, regular approximately 28-day cycles, spontaneous conception without assisted reproduction or embryo transfer, and confirmation that no clinician-established EDD exists; it returns provisional EDD = LMP + exactly 280 proleptic-Gregorian calendar days. Clinician-established-EDD mode accepts an EDD that the user confirms was established outside the tool by a qualified clinician and preserves it unchanged without verification, comparison, reconciliation, or redating. Both modes require an explicit civil reference date; gestational origin = EDD - 280 calendar days and signed gestational total days = reference date - gestational origin. A nonnegative total is displayed as floor(total days / 7) completed weeks plus remainder 0–6 days; a negative total retains signed days and days before gestational day 0 but returns no negative weeks-plus-days notation. Arithmetic at or beyond 42+0 is retained with a raw range flag only. Dates must be exact ASCII YYYY-MM-DD civil dates in years 0001–9999; leap days are handled by Gregorian calendar arithmetic without timestamp, timezone, daylight-saving, locale parsing, inferred today, floating-point dating, or rounding. Editing any source date or basis revokes every applicability confirmation and prior output. Output is limited to model/review identity, basis and exact entered date, EDD and reference date, signed total, eligible completed-week-plus-day representation, phase/range/sign audit, applied source keys, and fixed warnings. It does not establish, verify, compare, reconcile, or revise the best obstetric estimate; calculate ultrasound, CRL, BPD, ART, embryo-transfer, conception, ovulation, fetal age, cycle-adjusted dating, trimester, term status, or care dates; or provide diagnosis, prognosis, treatment, monitoring, induction, delivery timing, management, or recommendation.

Population

Civil-day documentation for a pregnancy using exactly one explicit source basis and one explicit reference date. Provisional-LMP mode is limited to a certain first day of a normal LMP, regular approximately 28-day cycles, spontaneous conception without ART or embryo transfer, and no clinician-established EDD. Clinician-established mode requires the user to attest that the entered EDD was established externally by a qualified clinician; the arithmetic does not verify its method or authority. The same page deliberately narrows all inputs to exact civil dates and supplies no clinical dating adjudication. A provisional LMP result is a preliminary calendar estimate only; current Canadian guidance supports early-ultrasound assessment and the complete clinical record remains controlling.

Limites et exclusions

An uncertain, atypical, unknown, or estimated LMP; irregular or materially non-28-day cycles; assisted reproduction or embryo transfer; a clinician-established EDD in provisional-LMP mode; absent applicability confirmation; combined LMP and EDD bases; an inferred current date; or a date outside the supported Gregorian civil-date domain. · Cycle-length adjustment; ovulation, conception or fetal-age estimation; ultrasound, crown-rump-length, biparietal-diameter or other biometric dating; ART or embryo-transfer dating; reconciliation of competing dates; selection of a dating method; or redating thresholds and tables. · Establishing, verifying, comparing, revising or replacing the best obstetric estimate; interpreting a discrepancy; determining viability, trimester, preterm, term, post-term or other gestational category; or representing the clinician-established input as verified by this tool. · Use to schedule, begin, stop, withhold or delay assessment, screening, laboratory testing, imaging, medication, corticosteroids, induction, delivery, transfer, urgent care or any other management; diagnosis, prognosis, risk, probability, treatment, disposition or recommendation. · Reproduction, adaptation or translation of ACOG, SOGC, AIUM, PHAC or journal prose, tables, figures, interfaces, official translations, logos, seals or branding, or any implication of endorsement. This implementation uses independently expressed factual calendar arithmetic and original English/French interface wording; clinical, professional French and legal review remain pending.

• https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2017/05/methods-for-estimating-the-due-date
• https://www.acog.org/practice-management/health-it-and-clinical-informatics/revitalize-obstetrics-data-definitions
• https://www.canada.ca/en/public-health/services/publications/healthy-living/maternity-newborn-care-guidelines-chapter-3.html
• https://www.canada.ca/fr/sante-publique/services/publications/vie-saine/soins-meres-nouveau-ne-lignes-directrices-nationales-chapitre-3.html
• https://doi.org/10.1016/j.jogc.2019.04.010
• https://doi.org/10.1016/j.jogc.2019.04.011
• https://doi.org/10.1016/j.jogc.2024.102694
• https://www.pregnancyinfo.ca/your-pregnancy/healthy-pregnancy/due-date-calculator/
• https://www.pregnancyinfo.ca/fr/your-pregnancy/healthy-pregnancy/due-date-calculator/
• https://www.aium.org/docs/default-source/resources/guidelines/obstetric.pdf?sfvrsn=a2dbdcfd_1

Outil importé de la bibliothèque PharmaTek de MDose. Aucune date de révision clinique indépendante n’est documentée dans cette version.

Bibliothèque source

PharmaTek · MDose

Version importée

4b66536936ed

État de publication

Révision clinique en cours