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What if the calculator gives a different date than my doctor?

Trust your doctor! While our calculator uses the same methods healthcare providers use, your doctor has additional information, like physical exams and ultrasound measurements.

Medically Reviewed Content
Medically Reviewed
By Ferty9 Medical Board, at Ferty9 Fertility Center | Last Reviewed: Aug 28, 2025
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Fertility Assessment Package Fertility Assessment Package

Security Shield Icon No need to worry, your data is 100% safe with us!