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Earlier the better: In the first trimester (< 14 wks) it's accurate within days. The later in pregnancy, the more inaccurate it is to date a pregnancy. Roughly, if an ultrasound differs by a week in the first trimester, dates are changed. 2 weeks for second trimester & 3 wks difference in the third trimester to change the due date compared to an lmp due date. Always keep the earliest us edc, it should never change. ...Read moreSee 1 more doctor answer
An ultraound, also known as a sonogram, is a painless and relatively inexpensive imaging test that utilizes sound waves instead of ionizing radiation. There are no side effects. Ultrasound can give us two-dimensional, and in some applications three-dimensional, images of structures and organs in virtually any part of the body. In addition to diagnostic uses, such as evaluating abnormalities in the abdomen, pelvis, and breast, ultrasounds are commonly used to guide needle and catheter placement in a variety of surgical ...Read more
No: Testicular us looks for abnormalities of the testicle. Transrectal us is used to evaluate either the anal sphincter mechanism or stage rectal rumors. ...Read more
What's the error margin with conception dates with an transvaginal ultrasound done at 9 weeks of pregnancy?
5 days: Typically it's plus or minus 5 days. ...Read more
Depends: On the size if the baby. Transabominally is fine as the baby increases in size. If it is really small then tv is bettet. ...Read more
See below: About 7 to 8 days.Get a more detailed answer ›
Transvaginal ultrasound on 9/19/13 dated pregnancy at 8w3d. 4/28/14 due date. Next ultrasound 12/13/13 dated 20w4d. Possible dates of conception?
Maybe: This is in the area of overlap where crl loses accuracy and measuring fetal parts like head diameter is also not as accurate, which is why we like to do sono before 12 or after 14. ...Read more
All : All if those can calculated after obtaining the gestational age. ...Read more
Access point.: Both transabdominal and transvaginal sonogram are useful and may even be complementary in imaging the pregnant uterus or non-pregnant pelvis. Different probes are used for each type and the transvaginal approach is clearly less comfortable, however it has the advantage of improved imaging in obese women, in early pregnancy and in fetal brain lesions in late pregnancy. ...Read more
Best on earlier u/s: Ultrasounds use composite data obtained during the exam to determine an EDD (estimated date of delivery). This date will also have a +/- number of days giving an accuracy range. First trimester ultrasounds are accurate to within about a week, second trimesters estimates are accurate within about 2 weeks, and third trimester scans about 3 weeks. ...Read more
FOR WHAT?: We need to know what it is that you are trying to evaluate. ...Read more
Lmp november 18 early transvaginal ultrasound put edd on august 29th conception date range? Thanks doctors
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