How accurate is ultrasound dating at 9 weeks

Which sunscreen is best? A comparison of recalled date of last menstrual period with prospectively recorded dates. I would only be concerned for you if they moved your due date way up, since they only let you go 7 to 10 days over most of the time, and no one needs to be induced unnecessarily. The earlier the US the more accurate it is. Are ultrasounds a necessary part of prenatal care? Au fil de la grossesse: I think I should be a week less than they say.

how accurate is ultrasound dating at 9 weeks

What to Expect When is your baby due? And the later the US the more inaccurate it can get too. Judging by everything you said, it sound to me like you conceived the end of May rather than the 3rd. Drew - February 7. Pregnancy Due Date Calculator: Jan 14, Messages: I took one again on June 22 and it was positive. They can be off a week or 2 easily.

Earlier ultrasounds are more accurate in terms of predicting the due date, so that's why doctors will usually use the dates and  As the pregnancy progresses, the accuracy of an ultrasound for predicting due dates decreases. Between 18 and 28 weeks of gestation Читать ещёEarlier ultrasounds are more accurate in terms of predicting the due date, so that's why doctors will usually use the dates and measurements from the first ultrasound of the pregnancy as a reference. As the pregnancy progresses, the accuracy of an ultrasound for predicting due dates decreases. Between 18 and 28 weeks of gestation, the margin of error increases to plus or minus two weeks. After 28 weeks, the ultrasound may be off by three weeks or more in predicting a due date. Thus, later in pregnancy, ultrasound measurements are more valuable for evaluating the baby's growth over ti Скрыть. Are the dates you put in accurate? It looks like the dating scans were a month apart but the size actually went down a day?  An ultrasound performed at 13 weeks would have an accuracy of about ± 4–5 days. Ultrasound is also largely operator dependent so diagnosis is only as good as the tech/doctor who interprets the scan. Читать ещёAre the dates you put in accurate? It looks like the dating scans were a month apart but the size actually went down a day? I would go to an actual clinic (like an MFM) that specializes in dating ultrasounds. In general, the earliest scans are more accurate than dating scans performed later in pregnancy but the dates you gave and sizes are just really off. Views · 2 Upvotes · 1 Upvote.  An ultrasound performed at 13 weeks would have an accuracy of about ± 4–5 days. Ultrasound is also largely operator dependent so diagnosis is only as good as the tech/doctor who interprets the scan. Even in the best hands a patient who has 4 ultrasounds during her pregnancy will likely get 4 different due dates but within the error expected based upon dates. Скрыть. How accurate is the ultrasound on 6 and 10 weeks?  Ultrasounds are more accurate at 6 weeks for this purpose than at 10 weeks, and the way she is taking Plan B, she would certainly have irregular cycles that could not be used to count forward from to determine a Читать ещёHow accurate is the ultrasound on 6 and 10 weeks? Thanks. COMMUNITY LEADER. AnnieBrooke. Ultrasounds are more accurate at 6 weeks for this purpose than at 10 weeks, and the way she is taking Plan B, she would certainly have irregular cycles that could not be used to count forward from to determine a conception date. By 10 weeks, an ultrasound could be several days off for dating purposes. Sex prior to January 6 would probably be too early to produce a baby. In your shoes I would operate on the assumption that the baby is yours, but would do a DNA test once the baby arrives just to put the ques Скрыть.
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