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are 6 week ultrasounds accurate

A 36-year-old female asked:
Dr. Amy Levine
22 years experience Radiology
Ultrasound dating: First trimester ultrasound is accurate within 5-7 days. . There is no test that can date conception more accurately than a 1 week window. That said, ... Read More
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A 36-year-old female asked:
Dr. Pavel Conovalciuc
22 years experience Family Medicine
Pregnancy us: Early pregnancy ultrasounds are very accurate, however, 1 week difference from last menstrual period doesn't appear that major difference.
A 38-year-old female asked:
Dr. Natalie Sieb
13 years experience Family Medicine
Prenatal?: If you're asking about a prenatal ultrasound, no not necessarily. If anything, a 10 week ultrasound may give you more detail you may not be able to se ... Read More
A 39-year-old female asked:
Dr. Bruce J. Stringer
46 years experience Radiology
Less variability: There is very little difference in size between different 6-8 week embryos. Therefore there is less uncertainty of their ages. The further along the p ... Read More
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A 36-year-old female asked:
Dr. Wayne Ingram
Specializes in Obstetrics and Gynecology
Not necessarily: Due dating pregnancies is more accurate with more than one ultrasound performed. However, the 6 week ultrasound might be more accurate in dating your ... Read More
A female asked:
Dr. Clarene Cress
Specializes in Pediatrics
Fairly accurate: Onset of labor and delivery depends on multiple factors, mostly maternal, and estimates are that 10% of infants are born earlier than 37 weeks. Age o ... Read More
A 38-year-old female asked:
Dr. Robert Kwok
32 years experience Pediatrics
I vote for: 10 weeks: Usually, prenatal ultrasound scans done while 8-11 weeks pregnant give accurate dating estimates. All dates are estimates, but that doesn't matter muc ... Read More
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A 36-year-old female asked:
Dr. Robert Killian
27 years experience General Practice
Unanswerable: There has to be more to this story. Why would any OB offer you three ultrasounds so very close together? Ob ultrasounds are thought to be most accur ... Read More
A 30-year-old female asked:
Dr. Joseph Accurso
28 years experience Radiology
Depends: On what ?S are being asked. Best time to date the age of the fetus is 8-13 weeks. Best time to evaluate the anatomy is 18-22 weeks. As they get o ... Read More
A 39-year-old female asked:
Dr. Gerard Honore
28 years experience Fertility Medicine
Yes and no: They are accurate, but only to around +/- 3 weeks.
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A 25-year-old female asked:
Dr. Bac Nguyen
22 years experience Family Medicine
They are excellent: The hpts are quite accurate, but they have their limit--maybe too early for the test to pick-up in cases when testing too early. In your case, you sa ... Read More
A 27-year-old male asked:
Dr. Robert Kwok
32 years experience Pediatrics
3 weeks after sex: A urine pregnancy test done correctly gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened) or 1 week after mi ... Read More
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A 31-year-old female asked:
Dr. Gerard Honore
28 years experience Fertility Medicine
Quite possible!: First your ega ("how far along") is 2 weeks longer than actually conceived, because it's dated from a theoretical last period, not conception. There' ... Read More
A 36-year-old female asked:
Dr. Andrew Doe
19 years experience Interventional Radiology
Not as accurrate: As they are at 4-6 weeks.
A 30-year-old female asked:
Dr. James Ferguson
45 years experience Pediatrics
Depends: The precision of an ultrasound depends somewhat on the equipment, the technician, the interpreter & the reason for study. If the scan is done to verif ... Read More
A female asked:
Dr. Gerard Honore
28 years experience Fertility Medicine
Concerning: It is unusual to not see a HB on TVUS at 6+ weeks, so prospects are guarded. Do not jump to conclusions though; have you talked with your IVF doctor's ... Read More
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A 26-year-old female asked:
Dr. Andrea Brand
Specializes in Family Medicine
Pregnancy test: A negative home pregnancy test should be reliable 2 weeks after a missed period.
A 28-year-old female asked:
Dr. Alan Patterson
41 years experience Obstetrics and Gynecology
Should be very: Accurate if done properly , should be able to see a fetus with a normal rate fetal ht beat at that time rame.
A 30-year-old female asked:
Dr. Brian Nguyen
10 years experience Obstetrics and Gynecology
Diagnostics: This question is hard to answer because it depends upon what you're looking for with your first trimester ultrasound. If you're trying to figure out h ... Read More
A 36-year-old female asked:
Dr. Piotr Obara
13 years experience Radiology
Yes: Ultrasound dating is most accurate early in the pregnancy using the crown-rump length (crl) of the small fetus. The measurement can be done starting ... Read More
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A 25-year-old female asked:
Dr. Robert Killian
27 years experience General Practice
Being Pregnant: Yes. The early ones are thought to be more accurate than later in pregnancy. You can verify dating with a conception calculator. Remember all the to ... Read More
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90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

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