Observed arrival · 2026-08-25

OB Wheel, a pregnancy-dating calculator with six routes in

ob-wheel.com Observed source

Editorial interest 77/100 Selection signal · not a rating of the site

A browser-based calculator for estimating due dates, gestational age, trimesters, and pregnancy milestones from LMP, EDD, ultrasound, conception, or IVF dates.

Landing page captured for the 2026-08-25 issue.

Field notes

The interface supports standard LMP dating alongside known-EDD back-calculation, ultrasound re-dating, conception or ovulation dates, and IVF timing. IVF users can specify embryo-transfer or egg-retrieval dates and select Day 5 or Day 3 embryo age. The page also exposes an “As of” date, adjustable cycle length, and copy, link, print, and reset controls; its browser-only privacy behavior is stated on the page.

Observed signals

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

◎NicheUnusually specific use

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