Or have you just received a BFP? Input some information into this handy pregnancy due date calculator, which will predict an estimated due date by lmp. Your browser does not support iframes. The due date calculator can be found here.
Predicting date of birth and examining the best time to date a pregnancy
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Redating a pregnancy may occur when there is a discrepancy between the estimated due date EDD calculated by the last menstrual period LMP and that by ultrasound. Care should be taken when redating a pregnancy, especially in the third trimester, as there may be other reasons for a fetus to be small for gestational age e. According to the ACOG redating is more reliable using the earliest available and reliable ultrasound examination surrogates. For instance, CRL in the first trimester would be more accurate than a debatable uncertain LMP or 2nd-trimester biometrics.
Use this calculator by plugging in either the date of your last menstrual cycle or the date of conception. That's it! The pregnancy calculator will do the rest! There are several ways. If you happen to know the day you conceived, you can count 38 weeks from that day to find your due date.
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