Ultrasound due date different from lmp

However be aware your due date is just an estimate. My 20 week ultrasound matched up with the 1226 date.

Same here lmp due date.

Ultrasound due date different from lmp. The sonographer just said that you can ovulate at different times during your cycle and thats why the ultrasound due date can differ from the LMP due date. I think maybe the bubs is just a bit smaller at this stage I could maybe understand it being off by maybe a week but not the 2 that she thinks. Scans are an accurate way to give you a due date confirms Nigel from the Society and College of Radiographers.

If the scan date differs from your LMP dates then the scan dates will be used but do discuss with your midwife if you are concerned. The best time to establish this date is at the scan you are offered between 11 weeks and 2 days and 14 weeks plus 1 day. If the margin of error is bigger than the difference in days between the due dates use the LMP date as your due date.

If the margin of error is smaller than the difference use the ultrasound date as your due date. Can your due date change. Yes your estimated due.

LMP would have me at 1219 but ultrasound was 1226 So they changed mine to 1226 since it was off by a week. My 20 week ultrasound matched up with the 1226 date. Im being induced 2-3 weeks early anyways so Ill still be earlier than my original date.

Why is my ultrasound due date different. Your doctor may change your due date based on the ultrasound measurement. This is most likely to occur in the first trimester especially if the date estimated by the ultrasound differs by more than one week from the date estimated by your doctor based on your LMP.

Can conception date be off by 2 weeks. Ovulation isnt a perfect science and. Same here lmp due date.

May 9 us due date. May 14 was may 8 after 12w us so not sure what date to use. However be aware your due date is just an estimate.

An ultrasound scan gives you a more accurate picture. It estimates your babys age by measuring different parts of your babys body such as her head abdomen and legs. In the second and third trimester a difference in age of up to two weeks is considered normal between your gestational age and the ultrasound scan age.

With my last pregnancy my lmp date was different to my ultrasound date by nearly 3 weeks my doctor said they go of your cycle being around 28 days some women have shorter cycles others longer thats why my dates didnt match i have a longer cycleMy ultrasound date was the correct one and i had a beautiful girl. Posted 8 years ago. Hiya everyone I was just looking over my hospital notes and remembered that ive had 3 different due dates this pregnancy My first was november 13th from my LMP which was the 7th of febuary then I had a EDD of the 17th then it was bumped up to the 20th november after my 12week ultrasound.

Ultrasound due date different from LMP - posted in Pregnancy. Tips Questions and Information. Hi Was just wondering if any one knew if the ultrasound goes on the first day of your LMP.

If dating by ultrasonography performed between 14 07 weeks and 15 67 weeks of gestation inclusive varies from LMP dating by more than 7 days or if ultrasonography dating between 16 07 weeks and 21 67 weeks of gestation varies by more than 10 days the EDD should be changed to correspond with the ultrasonography dating Table 1Between 22 07 weeks and 27 67 weeks of gestation ultrason. Expected date of delivery EDD is calculated by adding 280 days 40 weeks to the first day of your last menstrual period LMP. Ultrasound of the foetus at 6 to 7 weeks can also be used to measure the foetal size to confirm the expected date of delivery.

Enter the Calculated Gestational Age on the Date Ultrasound was Performed. Calculate Due Date or Gestational Age Using Dates. All calculations must be confirmed before use.

The suggested results are not a substitute for clinical judgment. LMP dating is based on the average textbook 28 day cycle with ovulation on day 14. This isnt the case for so many of us who have shorter or longer cycles.

A 12 weeks ultrasound is. But a due date calculated from last menstrual period with a due date calculator often doesnt match the due date that is estimated by ultrasound also known as a sonogram. During an ultrasound a technician spreads a warm gel over the lower part of the abdomen and then presses a tool called a transducer against the belly to examine the fetus using sound waves.

The estimated due date EDD or EDC is the date that spontaneous onset of labor is expected to occur. The due date may be estimated by adding 280 days 9 months and 7 days to the first day of the last menstrual period LMP. This is the method used by pregnancy wheels.

The accuracy of the EDD derived by this method depends on accurate. 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. This pregnancy due date calculator will give you a rough idea of when your baby should be born.

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. Please remember that the result will not necessarily be the day that your baby arrives. The actual date may be any time from 38 to 42 weeks in most pregnancies.

At all gestational ages ultrasound was superior to certain LMP in predicting the day of delivery by at least 17 days. When deliveries before 37 weeks were excluded crown-rump length measurement of 15-60 mm corresponding to 8-125 weeks had the lowest prediction error of 73 days.