Our Editorial Policy
How we research, write, fact-check, and medically review every calculator and guide on PregCalc — so you can trust the numbers and the advice behind them.
Quick answer
PregCalc publishes pregnancy calculators and guides built on peer-reviewed research and guidance from ACOG, WHO, the CDC, NHS, and Mayo Clinic. Every piece of medical content is written or edited by our content team, fact-checked against primary sources, and medically reviewed by Dr. Ruqaiya Khan, MD, FACOG, before publication. We disclose when AI tools assist in drafting, we never accept payment to influence a calculator’s results or a guide’s recommendations, and every page lists its sources, its last-reviewed date, and the credentials of the person who checked it.
See our medical review processOur mission
PregCalc exists to give people accurate, easy-to-understand answers during one of the most information-hungry periods of their life. Pregnancy and fertility decisions are YMYL — Your Money or Your Life topics: the stakes are real, and bad information can cause real harm. We built every calculator and guide on this site with that responsibility in mind.
Our goal is simple: every number our calculators produce, and every claim our guides make, should be traceable back to a credible clinical source and checked by a qualified medical professional before it reaches you.
Accuracy first
Calculations use established clinical formulas (Naegele’s rule, Hadlock biometry, WHO growth standards) — not approximations.
Clinically reviewed
Every medical page is reviewed by a board-certified OB-GYN before and after publication.
Plain-language
Clinical accuracy without jargon — we write for someone who’s worried at 11pm, not for a textbook.
How we create content
Every calculator and guide on PregCalc moves through the same six-stage pipeline before publication. No page skips a stage, regardless of how time-sensitive the topic is.
Our content production pipeline
Topic & research
Identify a genuine question, gather primary clinical sources
Drafting
Content team writes or structures the page against sourced facts
Fact-check
Every claim and calculation is checked against its cited source
Medical review
Dr. Khan reviews for clinical accuracy and safe framing
Editorial QA
Readability, accessibility, and schema markup checks
Publish & date
Page goes live with reviewer byline and last-reviewed date
For calculators specifically, this means the underlying formula is documented and checked against its clinical source (for example, Naegele’s rule for due dates or WHO LMS growth tables for percentiles) before any interface is built around it. The math is verified first; the design comes second.
Medical review process
All medical content on PregCalc — calculators, guides, FAQs, and week-by-week pages — is reviewed by Dr. Ruqaiya Khan, MD, FACOG, a board-certified obstetrician-gynecologist, before it is published, and again on a recurring schedule afterward.
What medical review checks
- Clinical accuracy of every stated fact or range
- Whether calculator formulas reflect current clinical practice
- Safe, non-alarming framing of risk and symptom information
- Appropriate “see a provider” guidance where relevant
- Alignment with current ACOG, WHO, CDC, and NHS guidance
What medical review is not
- Not a substitute for an individual diagnosis or care plan
- Not a guarantee that a calculator result applies to every pregnancy
- Not legal or insurance advice of any kind
Our review & re-review cycle
Pre-publish review
Dr. Khan reviews before the page goes live
90-day spot check
High-traffic calculators get an early accuracy check
Annual full review
Every page is re-reviewed at least once a year
Guideline-triggered review
Any page re-reviewed immediately if ACOG/WHO/CDC guidance changes
Sourcing & citation standards
We do not write medical content from memory or general impression. Every clinical claim is traced to one of a defined set of authoritative sources, and those sources are listed at the bottom of each page.
| Source type | Examples we cite | Used for |
|---|---|---|
| Professional medical bodies | ACOG, ASRM, RCOG | Clinical guidelines, dating rules, screening recommendations |
| Public health agencies | WHO, CDC, NHS | Growth standards, population statistics, public health guidance |
| Peer-reviewed research | Journals indexed in PubMed | Specific formulas (e.g. Hadlock), prevalence figures, study data |
| Established clinical references | Mayo Clinic, UpToDate-style patient resources | Plain-language explanations of established consensus |
- We link to primary or authoritative sources wherever possible, rather than other blogs or aggregator sites.
- Statistics and ranges are attributed to the specific body or study that produced them, not presented as unsourced fact.
- Where clinical guidance differs between bodies (for example, ACOG vs. NHS phrasing), we note the difference rather than picking one silently.
- We do not cite forums, social media, or unverified personal anecdotes as evidence for any clinical claim.
How we meet E-E-A-T standards
Google evaluates health content against Experience, Expertise, Authoritativeness, and Trustworthiness (E-E-A-T). Here’s specifically how each calculator and guide on PregCalc is built to satisfy it:
Experience
Content is shaped around the real questions people search at each stage of pregnancy and trying-to-conceive, not generic keyword targets.
Expertise
Medical content is reviewed by a board-certified OB-GYN with a published, verifiable credential page.
Authoritativeness
Every claim traces back to ACOG, WHO, CDC, NHS, or peer-reviewed research — never to unverified secondary sources.
Trustworthiness
Reviewer bylines, last-reviewed dates, a public corrections policy, and clear disclosure of any commercial relationships, on every page.
MedicalWebPage, Person, and FAQPage schema so reviewer credentials and review dates are machine-readable, not just visible to a human reader.Who writes and reviews our content
Dr. Ruqaiya Khan, MD, FACOG
Reviews all medical content for clinical accuracy against current ACOG, ASRM, WHO, and NHS guidance. View full credentials →
PregCalc Editorial Team
Researches, drafts, and fact-checks every guide and calculator against the sources listed above, before medical review.
We list a named reviewer on every medical page — never an anonymous “medical team” byline with no checkable credential.
Accuracy, updates & review cycle
Medical guidance changes. A page being accurate at publication doesn’t mean it stays accurate forever, so we treat publication as the start of a page’s life, not the end of it.
- ✓Every page shows its last-reviewed date in the author box at the bottom of the page.
- ✓Calculators are re-verified annually against their source formula or dataset (e.g. WHO growth tables), even if no interface changes are made.
- ✓Guideline changes trigger immediate review of any affected page, ahead of the normal annual schedule.
- ✓High-traffic pages get a 90-day spot check after publication to catch any early errors quickly.
Corrections policy
We get things wrong sometimes — every publication does. What matters is how visibly and quickly it’s fixed.
Minor corrections
Typos, broken links, or formatting issues are fixed as soon as they’re found, without a separate notice.
Substantive corrections
Any change that affects a calculator’s output or a guide’s medical recommendation updates the page’s last-reviewed date and, where material, is noted on the page.
Advertising & affiliate disclosure
PregCalc may earn revenue through display advertising and, on some pages, affiliate links to products we mention (for example, a recommended pregnancy pillow or prenatal vitamin brand).
Calculator formulas, due-date math, growth percentiles, and any clinical recommendation are never influenced by advertisers or affiliate partners — full stop.
Pages containing affiliate links carry a visible disclosure near the relevant content, and advertising never appears inside a calculator’s input or results area.
No advertiser, sponsor, or affiliate partner reviews or approves our medical content before publication. Editorial and commercial decisions are made separately, by different people.
Our use of AI
Like many publishers, we use AI tools as part of content production — for research synthesis, first-draft structuring, and accessibility checks. We disclose this openly rather than treating it as something to hide.
- ✓AI never publishes unsupervised. Every page, however it was drafted, goes through human fact-checking and medical review before it goes live.
- ✓Calculator formulas are sourced and verified by humans against the clinical literature, not generated or invented by AI.
- ✓Medical review is always human. Dr. Khan’s clinical sign-off cannot be automated or substituted.
- ✓We do not use AI-generated images of real medical procedures in place of accurate illustrations or licensed photography.
What we don’t do
Publish medical content without a named, credentialed reviewer.
Let advertisers or affiliates influence calculator results or recommendations.
Present a single study or anecdote as settled clinical consensus.
Position any calculator result as a diagnosis or a substitute for your provider’s judgment.
Contact our editorial team
If you spot an error, have a question about a source we cited, or want to suggest a topic, we want to hear from you.