Due Date Calculator Scan

If your cycle is irregular then it ll be more difficult to estimate your due date using dates alone. Thus later in pregnancy ultrasound measurements are more valuable for evaluating the baby s growth over time compared with earlier measurements than they are for predicting a due date. Our due date calculator provides so much more than an estimated birth date get your intuitive visual pregnancy progress report today.

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And that s how most healthcare providers do it.

Due date calculator scan. This method is based on the idea that women typically ovulate about 2 weeks after their period starts and pregnancy typically lasts about 38 weeks. The american college of obstetricians and gynecologists acog recommends changing the edd if the ultrasound in the first trimester differs more than 7 days from the lmp date or more than 10 days between the 12th and 20th weeks of your pregnancy. 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. Enter date ultrasound was performed enter the calculated gestational age on the date ultrasound was performed weeks days calculate due date or gestational age using dates all calculations must be confirmed before use.

The most common way to calculate your due date is by counting 40 weeks from the first day of your last menstrual period lmp. If you know the date of the first day of your last menstrual period lmp or have already had your first ultrasound scan you can use this tool. 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. Add to or subtract from a date enter a start date and add or subtract any number of days months or years.

Please remember that the result will not necessarily be the day that your baby arrives. The suggested results are not a substitute for clinical judgment. Count days add days workdays add workdays weekday week. The actual date may be any time from 38 to 42 weeks in most pregnancies.

Another way to do it is to subtract three months from the first day of your last period and add seven days. After 28 weeks the ultrasound may be off by three weeks or more in predicting a due date. Remember these are just estimations based on a 28 day menstrual cycle. Once you enter the date of your last menstrual period the calculator will tell you your estimated conception date when you actually got pregnant and your estimated due date.

Using a due date calculator is a good idea for any mom to be. You ll receive a much more accurate estimated due date edd when you have a scan. Note that your menstrual period and ovulation are counted as the first two weeks of pregnancy.