Because a reliable estimated date of delivery EDD is important, you and your practitioner can use your conception date instead if you remember it. Just add days to get your estimated due date.
If you are part of the growing tribe of IVF moms, you can calculate your due date more precisely using your IVF transfer date. An early ultrasound, which can more accurately date the pregnancy.
Just be aware, however, that not all women get an early ultrasound. Your fundal height, which is the measurement from your pubic bone to the top of your uterus, is checked by your practitioner at each prenatal visit and helps confirm your due date.
Whether you're trying to avoid being very pregnant in the middle of summer or are a teacher who wants to maximize time off with your little one, you can try to time when you conceive in order to "plan" your due date. But even if you're one of the lucky ones who's able to get pregnant when she really wants to, just remember that you probably won't be able to map out exactly when you'll give birth to the day or even the week or month!
It may be that your periods are irregular and your early ultrasound dating was off, or that your first ultrasound was in the second trimester.
Talk to your practitioner if you have any questions or concerns. The educational health content on What To Expect is reviewed by our team of experts to be up-to-date and in line with the latest evidence-based medical information and accepted health guidelines, including the medically reviewed What to Expect books by Heidi Murkoff.
This site complies with the HONcode standard for trustworthy health information. This educational content is not medical or diagnostic advice.
Accurate dating of pregnancy is important to improve outcomes and is a research and public health imperative. This is not a diagnosis. Other biometric variables, such as additional long bones and the transverse cerebellar diameter, also can play a role. Determine last date of LMP. For example, for a day-5 embryo, the EDD would be days from the embryo replacement date. Epub Mar
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The estimated date of delivery (EDD) pregnancy calculator equation current date, last menstrual period, ultrasound date, and gestational age by ultrasound. date of delivery based on the Gestational Age by US and the Ultrasound Date. Calculate estimated due date (EDD) and gestational age based on: Conception Greater than 5 days before 9 0/7 weeks of gestation by LMP; Greater than 7.
Creating an account is free, easy, and takes about 60 seconds. Log In Create Account. The principal investigators of the study request that you use the official version of the modified score here. Pregnancy Due Dates Calculator Calculates pregnancy dates, forward from last period or backward from due date.