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1. americanpregnancy.org › resources › pregnancy-calculatorPregnancy Due Date Calculator - American Pregnancy Association

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   Calculate your due date and conception date based on the date of your last menstrual period and the average length of your cycles. This is not a diagnosis, but an estimate based on averages.

2. www.yourduedate.comPregnancy Due Date Calculator

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   Your due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (assuming a 28 day cycle). Note that your menstrual period and ovulation are counted as the first two weeks of pregnancy. If you deliver on your due date, your baby is actually only 38 weeks old, not 40.

3. www.whattoexpect.com › duPregnancy Due Date Calculator & Conception Calculator

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   First day of last period. Most pregnancies last around 40 weeks (or 38 weeks from conception), so typically the best way to estimate your due date is to count 40 weeks, or 280 days, from the first day of your last menstrual period (LMP). You can also subtract three months from the first day of your last period and add seven days.

4. People also ask

   How is my due date calculated?

   • Your due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (assuming a 28 day cycle). Note that your menstrual period and ovulation are counted as the first two weeks of pregnancy. If you deliver on your due date, your baby is actually only 38 weeks old, not 40.

   Pregnancy Due Date Calculator

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   What is an estimated due date?

   • An estimated due date should be thought of as an indication of a range, or time frame, when baby might come. The modern formula, LMP + 280 days = EDD, is based on a older formula called Naegele's Rule. Naegele's Rule is named after the German professor of obstetrics who popularized the simple formula in the early 1800's.

   Pregnancy Due Date Calculator: The Definitive Calculator and Guide

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   What is the pregnancy due dates calculator?

   • The Pregnancy Due Dates Calculator Calculates pregnancy dates, forward from last period or backward from due date.

   Pregnancy Due Dates Calculator

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   What is the due date if I'm Pregnant?

   • “The due date is 40 weeks from the first day of your last menstrual period. But some women can go beyond that to 41 weeks.” In fact, the first thing you’ll likely notice when you let your health care provider know you are pregnant is that pregnancy is calculated in weeks rather than months.

   Pregnancy due date calculator - Flo

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5. www.mamanatural.com › due-date-calculatorDue Date Calculator — Amazingly Accurate Pregnancy Calculator

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   Our online due date calculator uses a simple method to calculate your due date. Your due date is estimated to be 40 weeks after the first day of your LMP. Your cycle is assumed to be 28 days long, with ovulation occurring at day 14. Therefore the calculator adds 280 days (40 weeks) to your LMP. This method of due date calculation is known as ...

6. flo.health › tools › due-date-calculatorPregnancy due date calculator - Flo

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   Apr 3, 2019 · Do this using the following formulas. - For first pregnancies: LMP + 12 months – (2 months and 14 days) = EDD. - For subsequent pregnancies: LMP + 12 months – (2 months and 18 days) = EDD. Then, you use the expected due date in the equations below.

7. Videos

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8. www.mdcalc.com › calc › 423Pregnancy Due Dates Calculator

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   Enter date of last menstrual period, gestational age (on today's date or other ultrasound date), date of conception, OR estimated due date to estimate the other dates. Only EDD is affected by cycle length ≠28 days when calculating from LMP, EGA, and EDC. When starting with EDD, all results change depending on cycle length.

9. www.duringpregnancy.com › calculators › due-datePregnancy Due Date Calculator: The Definitive Calculator and ...

   www.duringpregnancy.com › calculators › due-date

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   You can calculate your due date without using a due date calculator. Count 280 days, or 40 weeks, from the first day of your last menstrual period; the date you end up with is your estimated due date. Calculate Due Date by Counting Days: EDD = LMP + 280 Days. LMP = First day of the Last Menstrual Period.