It’s important to remember that every pregnancy affects women differently, even when the same woman has more than one child. Which week of pregnancy does delivery become safe? The margin of error on ultrasounds in predicting due dates increases by a few weeks the later the ultrasound is done, otherwise, they give a fairly accurate due date. Is ultrasound due date more accurate than LMP?Įxperts suggest that ultrasounds are more accurate in predicting your pregnancy due date but only when done during the first trimester, or early into the second trimester, no later than around 20 weeks. However, in circumstances where pregnancy happened because of artificial insemination or invitro fertilization, conception date is fairly easy to determine as the exact date of conception likely involved a visit with your doctor. Conception typically occurs about 11-21 days after the first day of the last period. What’s interesting about predicting due date in pregnancy is that if the parents-to-be got pregnant the old-fashioned way, it’s easier to predict the due date based on the LMP. The reason doctors tend to add two weeks to pregnancy due date is because technically, by the time most women realize that they're pregnant, it’s been around 4 weeks since their last period which is when the gestational period starts – the first day of the last period.
This is where things get a little confusing. You can also calculate 40 weeks and/or 9 months forward to give you an idea of your expected due date as well. It starts with the first day of your last period. To to calculate your EDD in pregnancy, see the example above. Given the example above, your estimated due date (EDD) would be July 8 th of the following year
Calculate my due date plus#
Lastly, add 1 year plus 7 days to that date.Count back 3 calendar months from that date – so if your LMP was on October 1st, three months prior would be July 1st.
Calculate my due date how to#
If you’re curious how do you calculate due date there are several methods that can be found online on how to calculate pregnancy date. Nothing is more exciting than when you finally see those double lines on the take home pregnancy test! While your mind starts swimming with who you’re going to tell first, wondering where the baby will sleep, what you will name it and of course, all of the things you’ll need before, during and after baby’s arrival, one thing is indisputable – your curiosity over how to calculate your pregnancy due date! While your doctor (and the internet!) can help you answer this question, keep on reading for some ideas on how to calculate your due date! How do you calculate your expected due date?
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