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What Does My Ultrasound Test Report Indicate?

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Posted on Tue, 12 Jul 2016
Question: what is this measurement based on because I dont see they are measuring the fetus. Is it more accurate than the ones after 10 weeks. because my 12 week ultrasound is a weeks ahead. and this one that im sending you is not. but u want to know if it is measured properly.? and what is it they are measuring .
doctor
Answered by Dr. Jacqueline Brown (57 minutes later)
Brief Answer:
These are images of a gestational sac and a very early pregnancy

Detailed Answer:
Hello, and I hope I can answer your question today.

The images you sent are of a very early pregnancy, between 5 and 7 weeks. The measurement image you see is just of the gestational sac, which is where the fetus grows.

The sac is the first structure seen in pregnancy. Then later a structure called a fetal pole and a yolk sac develop. The yolk sac is the little circle you see in the image and the fetal pole is the little gray speck. This is a normal ultrasound at 5-6 weeks.

The earliest ultrasound is the most accurate, because the margin of error increases as the pregnancy progresses. What that means is if you measure, for example, a 10 week fetus, you can tell less whether the fetus is older, or if it is just big for its age.

So in summary, the images you sent is a measurement of the sac (without the fetus) and another image of a sac containing a fetal pole and a yolk sac.

I hope I was able to adequately answer your question today and that this information was helpful. If you need anything further, please do not hesitate to contact me.

Best wishes,

Dr. Brown
Above answer was peer-reviewed by : Dr. Raju A.T
doctor
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Follow up: Dr. Jacqueline Brown (1 hour later)
both of these images are from the same day. I want to know if they are measured properly.?
doctor
Answered by Dr. Jacqueline Brown (22 minutes later)
Brief Answer:
There is only one with calipers for measurement- the sac

Detailed Answer:
Hello again,

The only image with measurements is the one of the sac. It is measured in three dimensions, which appears to be correct. The measurement of the sac is consistent with a 6 1/7!week gestation, which seems accurate based on the measurement of the sac size. You can look at the following reference for yourself:

http://www.ultrasoundpaedia.com/normal-1sttrimester/

This is the usual way to confirm dating by early ultrasound, so I would say that the ultrasound looks accurate. In another view, the sac shows the fetal pole and yolk sac. I am not sure what you mean when you ask if the scan was done correctly- but the measurement it took is consistent with a 6 week pregnancy. The reasons the images look different is that the image is only in two dimensions, so in the image of the gestational sac measurement you weren't able to see the fetus because they were measuring at the largest diameter, while the rest of the pregnancy may have been off to the side. This is the standard technique that is used for an ultrasound used to figure out the dating of a pregnancy.

I hope this explanation clarifies things for you. Please look at the link to the article I sent- it may help to see the chart within it to understand what the measurements mean.

Regards,

Dr. Brown
Above answer was peer-reviewed by : Dr. Raju A.T
doctor
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Follow up: Dr. Jacqueline Brown (1 hour later)
thank you very much. so do you suggest i stick with my earliest ultrasound for due date?
doctor
Answered by Dr. Jacqueline Brown (6 minutes later)
Brief Answer:
Yes, the earliest ultrasound is the most accurate.

Detailed Answer:
Yes, you should keep the due date calculated by the earlier ultrasound. That is the standard way it is recommended during prenatal care all over the world.

I wish you the best of luck with your pregnancy,

Dr. Brown
Above answer was peer-reviewed by : Dr. Yogesh D
doctor
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Follow up: Dr. Jacqueline Brown (33 minutes later)
well my 6 week ultrasound matches with my LMP OFF BY 2 days or 3. my 12 week ultrasound was off by a whole week. which made my ob change the due date. I dont think my 6 week ultrasound can be wrong. thats why i asked if it was measured properly..
doctor
Answered by Dr. Jacqueline Brown (5 minutes later)
Brief Answer:
Your OB should not change your due date

Detailed Answer:
Your OB should not change the due date based on the second ultrasound. You can calculate the due date based on the size of the sac alone- please look at the link I sent you in the previous question. So the ultrasound was done correctly, however I disagree with your OB's changing the due date based on the second one. The earliest ultrasound is always the most accurate.

Please again look at the article I referenced.

Regards,
Dr. Brown


Above answer was peer-reviewed by : Dr. Yogesh D
doctor
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Follow up: Dr. Jacqueline Brown (11 minutes later)
I did look at it thank you very much for that reference. I feel like changing OB. So as of now I am going to focus on my first ultrasound. thank you very much for all your help and guidance.
doctor
Answered by Dr. Jacqueline Brown (19 hours later)
Brief Answer:
You are very welcome

Detailed Answer:
You are very welcome, and thank you for using my services and healthcaremagic.com

Above answer was peer-reviewed by : Dr. Raju A.T
doctor
Answered by
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Dr. Jacqueline Brown

OBGYN

Practicing since :1996

Answered : 1425 Questions

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What Does My Ultrasound Test Report Indicate?

Brief Answer: These are images of a gestational sac and a very early pregnancy Detailed Answer: Hello, and I hope I can answer your question today. The images you sent are of a very early pregnancy, between 5 and 7 weeks. The measurement image you see is just of the gestational sac, which is where the fetus grows. The sac is the first structure seen in pregnancy. Then later a structure called a fetal pole and a yolk sac develop. The yolk sac is the little circle you see in the image and the fetal pole is the little gray speck. This is a normal ultrasound at 5-6 weeks. The earliest ultrasound is the most accurate, because the margin of error increases as the pregnancy progresses. What that means is if you measure, for example, a 10 week fetus, you can tell less whether the fetus is older, or if it is just big for its age. So in summary, the images you sent is a measurement of the sac (without the fetus) and another image of a sac containing a fetal pole and a yolk sac. I hope I was able to adequately answer your question today and that this information was helpful. If you need anything further, please do not hesitate to contact me. Best wishes, Dr. Brown