Pregnancy Calculator Due Date By Ultrasound

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.

Pregnancy calculator due date by ultrasound. Calculate delivery due date gestational age and other important dates during pregnancy using lmp ultrasound dating or date of conception ivf. Another way to do it is to subtract three months from the first day of your last period and add seven days. Ultrasounds that are done later in your pregnancy are not that accurate and that s why your due date shouldn t be changed if it is already set in the first trimester. After 28 weeks the ultrasound may be off by three weeks or more in predicting a due date.

Please remember that the result will not necessarily be the day that your baby arrives. 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. This will likely yield a more accurate result. This pregnancy due date calculator will give you a rough idea of when your baby should be born.

The first ultrasound done between six to ten weeks in your pregnancy is considered the most accurate method to predict your due date. Due date by lmp pregnancy due date calculator due date by ultrasound determine pregnancy due date using ultrasound results gestational age postoperative respiratory failure risk calculator estimate risk of postoperative respiratory failure edinburgh postnatal depression scale epds 10 question screener for postpartum depression. Download the app for the iphone or ipad beta version. The 280 day figure is based upon naegele s rule and is the most common method of calculating due dates.

If you choose to calculate by ultrasound date the calculator will work out your due date based upon how far along you are on that date.