Our Review Process
Pregnancy information is high-stakes. Here is exactly how DueDateCalculator.com creates, verifies, and maintains the accuracy of every calculator and article — and the people responsible at every step.
Research & Writing
Every topic starts with research: our lead health content writer, Ashok Kumar Poudel, studies peer-reviewed medical literature, ACOG practice bulletins, WHO guidelines, and ASRM protocols, then writes clear, structured content grounded in that research.
Human Medical Review
A licensed clinician reviews every page before publication. Human pregnancy content is reviewed by Dr. Bina Basnet, a licensed OB/GYN, who checks every formula, statistic, and clinical claim against current standards. Animal pregnancy content is reviewed by Dr. Sharad Singh Yadav, a Doctor of Veterinary Medicine. Reviewers can request changes or reject a page outright — publication requires their sign-off.
Calculator Formula Validation
Every calculator is tested independently of its code. We run known inputs through each tool and verify the outputs by hand against the published clinical formulas: Naegele's Rule (LMP + 280 days), IVF transfer dating (transfer date + 261 days for Day-5 embryos), ultrasound crown-rump-length tables, and standard gestation lengths for animal calculators. If the math does not match the medicine, the page does not ship.
Fact-Checking & Sourcing
We never invent citations. Claims about accuracy, gestation lengths, and clinical practices are checked against their source guidelines, and we use careful language like “research suggests” where the science is uncertain. Pages that fail fact-checking are sent back for revision — the same way a journal would.
Publishing, Attribution & Updates
Every page carries transparent attribution: who wrote it, who medically reviewed it, and their credentials. We monitor ACOG, WHO, and ASRM publications for guideline changes that affect our content, and pages are revised and re-reviewed within 30 days when guidance changes. Reviews of older pages happen on a rolling schedule so nothing goes stale.
Who Does What
Researches each topic, drafts the content, verifies claims against sources, and implements reviewer feedback.
Reviews all human pregnancy calculators and articles for clinical accuracy, formula correctness, and appropriate safety language.
Reviews all animal pregnancy calculators for correct gestation lengths, ranges, and species-appropriate care information.
Correction Policy
We aim to be right the first time — and honest when we are not. If you spot an error in a calculation, a statistic, or a medical claim, email editorial@duedate-calculator.com with the page URL and what looks wrong.
- Confirmed errors are corrected within 48 hours of verification.
- Corrections to formulas or medical claims are re-reviewed by a clinician before republishing.
- Substantive corrections are noted on the page so readers know what changed.
- Guideline-driven updates (for example, new ACOG recommendations) are revised and re-reviewed within 30 days.
Our Editorial Standards
DueDateCalculator.com is an informational resource, not a substitute for medical advice. Our standards draw on the same sources clinicians use:
- American College of Obstetricians and Gynecologists (ACOG)
- World Health Organization (WHO) — reproductive health guidelines
- American Society for Reproductive Medicine (ASRM)
- NIH PubMed peer-reviewed studies
- American Veterinary Medical Association (AVMA) — for animal content
What We Do Not Do
- We do not provide personalized medical advice or diagnoses.
- We do not recommend specific medications or treatments.
- We do not replace your OB-GYN, midwife, veterinarian, or healthcare provider.
- We do not collect or sell personal health data.
Have a question about our content or found an error? We want to know.
Contact us at: editorial@duedate-calculator.com
Or use our contact page →