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Gestational Age Calculator — Due Date, Conception & Implantation

Technical reference documents covering the formulas, methodology, and data behind Gestational Age Calculator — Due Date, Conception & Implantation. Use these to understand exactly how calculations are performed.

IVF Due Date: How Embryo Transfer Date Sets Your Due Date

The exact formula fertility clinics use to calculate an IVF due date from a Day 3 or Day 5 embryo transfer date — and why it differs from LMP-based dating.

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