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ultrasounds are a better judge, in an ultasound it measures the baby to see how big it is and then it is fed into a chart that will tell you when the due date is, the chart is based off of what size the baby should be at that week and day.

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Q: How do I know my accurate due date when based on my period it would be Jan 10 but an ultrasound says Jan 14?
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I went to a clinic on and the doctor said I was 5 weeks and 3 days. The next day I went to the hospital and they drew blood and did an ultrasound and said that I was 4 weeks which is more accurate?

You must have given them two different guesses on your last period date. But the hospital would be more accurate.


Your doctor says that an us is more accurate than lmp because a lot of woman don't remember their lmp and that you could ovulate at different times how true is this?

Women have cycles that are not all the same length but most women ovulate 14 days before a period is due. That is what makes the difference. At 7 weeks ultrasounds are accurate to within 3 days. At 20 weeks they are accurate within 5 days When I had my first pregnancy my cycle was 36 days which would mean my EDD would be 8 days early if my LMP was used, my US agreed with my cycle not my LMP. When I had my second pregnancy my cycle was 28 days and my ultrasound agreed with my LMP. So you are saying that the ultrasound is more accurate? Yes, the ultrasound is more accurate. I did go round the houses a bit to say it.


When did you conceive if your ultrasound said 19weeks 2days?

The ultrasound date is approximate and based on the size of the baby, but if you go back exactly that far it would be Sept 21.


Would a home pregnancy test be accurate if you're not due to get your period for another two weeks?

It would probably not be accurate since it is testing for the hormone HCG and you should wait until your period is due in anther 2 weeks to test again for accurate results


Can you take a pregnancy test if you are on your period and would it still be accurate?

If you are on your period is unlikely you are pregnant. Ask your GP if you are concerned.


If you cheated on your husband on Nov 20and your due date is Aug 11 when did you conceive?

The conception day would be 11/18/2008, based on you're due date. You're due date is more accurate in the early stages of pregnancy. SO if you got an ultrasound in you're first 12 weeks, it is pretty accurate. Good luck sweetey!


If an ultrasound says you are 17 weeks and 3 days pregnant is that the day you conceived or would it be that date plus an extra 2 weeks?

That means it is the date conceived (or within 48 hours of). It is never right on, but within a week of. Go by what the ultrasound says. No, if your ultrasound says 17 weeks and 2 days that would be that date plus 2 extra weeks, that is around the time of your last period, unless you have irregular periods or conceived straight after a miscarriage or something. The length of pregnancy is always measured from your last period even by ultrasound.


If someone has a false period during pregnancy will examination and ultrasound eventually establish accurate fetal age?

Well we just went to see the doctor about my fiance who according to her last period should be roughly 16 weeks along. The doctor said she was showing signs of being more like 20 weeks. My fiance's last period was late and light, and on further thought could quite possibly have been a false one. The doctor said when we go back for the ultrasound next month that we would be able to tell more accurately what the actual age was.


What machine would require an ultrasound transducer?

An ultrasound machine would require an ultrasound transducer. These are required as they are the part of the machine that delivers the image to the machine.


How can you tell how far pregnant you are if you do not know the exact day of your last normal period?

That would be a good question for your doctor. The doctor might suggest an ultrasound. From the ultrasound picture, the technician can estimate how old the fetus is and predict your due date.


You were 16 weeks pregnant your ultrasound said that the baby size was 18 weeks which one should you do by?

The ultrasound dating has excellent and precise estimation of gestation especially if done in the first trimester (first 12 weeks). After 12 weeks, its accuracy goes down. However, compared to dating according to menstrual cycle, the ultrasound would be more accurate.


I have an ultrasound scheduled on the 30th of this month if I am pregnant would they be able to see anything on the ultrasound even though it is only two weeks after ovulation?

If you were pregnant the developing embryo would be about the size of the head of a pin. The embryo is not the first sign of pregnancy found on ultrasound; the yolk sac shows up long before the embryo is visible. The yolk sac can't be seen uon ultrasound until at least four weeks after the last period.