Overview

OB Wheel is a free, online pregnancy calculator designed for both healthcare professionals and expectant parents. It simplifies the complex task of pregnancy dating by allowing users to input various dates (LMP, EDD, ultrasound, conception, IVF) and instantly receive an estimated due date, current gestational age, trimester information, and key milestone dates. The tool prioritizes privacy, running entirely in the user's browser with no data collection or sign-ups.

Key Features

• Six Dating Methods: Supports dating based on Last Menstrual Period (LMP), Known Estimated Due Date (EDD), Ultrasound, Conception, IVF, and reverse look-up.
• Instant Results: Provides immediate calculations for estimated due date, current gestational age (weeks and days), trimester, days pregnant, and days remaining.
• Key Milestone Dates: Generates a table of important pregnancy milestones, including trimester start/end dates and ACOG term categories.
• Target Gestational Age Calculation: Allows users to find out the date when the patient will reach a specific gestational age.
• Privacy-Focused: All calculations are performed client-side in the browser, ensuring no personal data is sent, stored, or tracked.
• Adjustable Cycle Length: For LMP-based calculations, users can adjust the average cycle length to improve accuracy.
• IVF Specific Dating: Offers precise dating for IVF, considering embryo transfer or egg retrieval dates and embryo age (Day 3 or Day 5).

Target Users

OB Wheel is ideal for a broad audience including:

• Obstetricians and Gynecologists: For quick and accurate patient dating during consultations.
• Midwives and Nurses: To efficiently track pregnancy progression and provide information to patients.
• Expectant Parents: To understand their pregnancy timeline, due date, and fetal development stages.
• Fertility Clinic Staff: For precise dating related to IVF and IUI procedures.
• Medical Students and Educators: As a practical tool for learning and teaching pregnancy dating methods.

Unique Selling Points

What truly sets OB Wheel apart is its unwavering commitment to privacy; all computations happen directly in the user's browser, eliminating any data transmission or storage, which is a significant concern for sensitive health information. Its versatility in offering six distinct dating methods, including detailed IVF options, covers nearly every common scenario. Unlike many online calculators, it accounts for nuances like cycle length adjustments and exact calendar arithmetic (including leap years), providing greater accuracy than traditional paper wheels. The instant display of comprehensive results, from due dates to detailed milestones, within a clean, ad-free interface further enhances its user-friendliness and professional appeal.

Pros and Cons

Pros:

• Highly Private: No data collected, stored, or tracked, ensuring complete user confidentiality.
• Versatile Dating Methods: Supports a wide array of dating inputs, making it adaptable to various clinical and personal situations.
• Accurate Calculations: Accounts for leap years and precise month lengths, offering more accurate results than physical wheels.
• Instant & Comprehensive Results: Provides all necessary pregnancy data (EDD, GA, milestones) immediately.
• User-Friendly Interface: Clean design and intuitive navigation make it easy for anyone to use.

Cons:

• No Offline App: While web-based, it lacks a dedicated offline mobile application.
• Relies on User Input Accuracy: The accuracy of results is dependent on the correctness of the dates entered by the user.
• No Direct Integration: Does not integrate with electronic health records (EHR) systems.