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This calculator provides accurate pregnancy date estimates by calculating from the last menstrual period, gestational age, or conception date.
Patients who are pregnant or may be pregnant.
Accurate estimates of gestational age may positively affect pregnancy outcomes, including lower risk of post-term induction and earlier detection of multiple gestations (Whitworth 2015).
According to ACOG, ultrasound measurement in the first trimester (up to and including 13 6/7 weeks of gestation) is the most accurate method to establish or confirm gestational age.
