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Doctor insights on: 10 Week Ultrasound Scan

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Dr. Michael Gabor
2,275 doctors shared insights

Sonogram (Definition)

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


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Is a gestational age reading accurate on a 10-week ultrasound? And what exactly are they measuring?

Is a gestational age reading accurate on a 10-week ultrasound? And what exactly are they measuring?

Accurate: A first trimester ultrasound is highly accurate. They are measuring what is called a crown (top of the head) rump (bottom of the bum) length. The length is compared to average size embryos to come up with a gestational age. ...Read more

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Are 6 and 12 week ultrasounds just as accurate as 10 week ultrasound for dating purposes?

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 accurate early on. So, I would rely on the week six u/s first. But, your OB may have better specific information here. ...Read more

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Can a 6 half week ultrasound be mistaken for a 10 half week scan?

No: If a person knows how to do an ultrasound, 10 weeks cannot be mistaken for 6 weeks or vice versa. ...Read more

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When an ultrasound scan measures you at 6 weeks, does it mean you are really at 4 weeks?

When an ultrasound scan measures you at 6 weeks, does it mean you are really at 4 weeks?

From conception.: Depends, how you calculate.
The term is calculated from the first day of your period.
This is traditionally so.
So, what it means really? From the time of conception? Yes. ...Read more

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What are the risks on baby of 4D ultrasound every week? (done by skilled technician in gerontology center, the duration of scan is 3-5 minutes)

What are the risks on baby of 4D ultrasound every week? (done by skilled technician in gerontology center, the duration of scan is 3-5 minutes)

None: As a radiologist, I know of no health concerns for you or the fetus from ultrasound. With that being said, unless there is an abnormality, there is no reason to do scans that often. There may be unknown risks that we won't learn about until the future. If you are doing the scans because it is for fun, I don't recommend you continue to do this. ...Read more

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Why would a 6.6cm cyst with echoes on ultrasound be visible after 6 weeks, however not visible on the scan another 4 weeks later and symptoms remain?

Why would a 6.6cm cyst with echoes on ultrasound be visible after 6 weeks, however not visible on the scan another 4 weeks later and symptoms remain?

No simple answer: It is still possible that the cause of your symptoms may not be related to the cyst. Continue with your gynecologist to seek out real cause of symptoms. ...Read more

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If NT ultrasound was on nov.20 putting me at 12 weeks, when did conception occur? If I was less than 11 weeks, could have the NT scan still been done?

If NT ultrasound was on nov.20 putting me at 12 weeks, when did conception occur? If I was less than 11 weeks, could have the NT scan still been done?

At 2 weeks gestation: When pregnancy dating is done by ultrasound scanning, the gestational age is the "number of weeks pregnant", and the estimated conception date is 2 weeks after the "start of the pregnancy". In this case, the start was 12 weeks ago (the person is 12 weeks pregnant), so the conception was 10 weeks ago. Life is never exact, so all numbers are estimates. ...Read more

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Dr said not to worry and ordered a 30-week ultrasound. I'm measuring small for 28 weeks. She said still normal...but scared.ips and 20 week scan normal?

Dr said not to worry and ordered a 30-week ultrasound. I'm measuring small for 28 weeks. She said still normal...but scared.ips and 20 week scan normal?

Follow the growth: Just as there are short and tall children, babies' sizes vary.
We have charts of normal size for fetal age. If there is a problem, growth will usually not be at a normal rate. This becomes obvious when the weight and dates are plotted on a growth chart. The Dr. is prudently suggesting following fetal growth and other data, even though the baby is within normal range, on the small side of average ...Read more

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I have had 2 Ultrasound scans that show my EDD as 9th January and 7th January respectively. It doesn't tally at all with my LMP. A lot of weeks off. About 6-8 weeks?

I have had 2 Ultrasound scans that show my EDD as 9th January and 7th January respectively. It doesn't tally at all with my LMP. A lot of weeks off. About 6-8 weeks?

Accurate estimates: Ultrasound dating scans in the first trimester, such as at 8-11 weeks of pregnancy, are very accurate... meaning plus or minus one week. Especially if the doctor feels the fetus is growing appropriately for gestational age through the course of the pregnancy, the ultrasound dating estimates are likely very good. That means use the ultrasound dating instead of the non-matching LMP dating. ...Read more

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Can a 12 half week ultrasound be mistaken for an 8 half week baby scan?

Can a 12 half week ultrasound be mistaken for an 8 half week baby scan?

Usually not: At 8-12 weeks it is very accurate for dating plus minus a few days. It cannot be off by a month. ...Read more

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What does it mean if my ultrasound scan report for 8 week growth is normal but no cardiac activity?

Sorry: All living 8 week fetuses should have cardiac activity. An 8-week fetus without cardiac activity has died. If there was any doubt whether there was good visualization of the pregnancy a transvaginal scan should have been done. Good luck. ...Read more

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At my 20 week ultrasound scan they said they were unable to see the left kidney, do they need to repeat it or do another test?

At my 20 week ultrasound scan they said they were unable to see the left kidney, do they need to repeat it or do another test?

Repeat post partum: The absence of one kidney is entirely compatible with good health. It is possible that another scan will show normal anatomy. After delivery a repeat scan to confirm the first is a good idea, couple this with a check of your overall kidney health and a discussion of risks to the kidneys from lifestyle and disease states, with your physician. ...Read more

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At 12 weeks scan the ultrasound technician saw that the baby has penetrated the empty sac of the vanishing twin.how can this be?

At 12 weeks scan the ultrasound technician saw that the baby has penetrated the empty sac of the vanishing twin.how can this be?

Clarification: I would schedule a visit with your doctor to ask for clarification on the sonogram findings. This is such a specific question it requires someone to view the images of the sonogram to be able to interpret the results ...Read more

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When you have an ultrasound dating scan and they say you are just under 4 weeks have they add 2 weeks or is that how old the fetus is?

When you have an ultrasound dating scan and they say you are just under 4 weeks have they add 2 weeks or is that how old the fetus is?

Gestational age: Usually we talk in "gestational age" which already adds the 2 weeks. But it would be unusual for them to say you were just under 4 weeks based on an ultrasound. In this case, they would be only able to measure the gestational sac size. If this is true, the ultrasound would usually be repeated in 2.5 more weeks at which time the "fetal pole" with heartbeat should be seen and measured. ...Read more

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If I've haf 2 ultrasound scans... One at 11w and one at 12 weeks. And both gave an edd of 18th august 2013. Did conception happen nov or dec?

If I've haf 2 ultrasound scans... One at 11w and one at 12 weeks. And both gave an edd of 18th august 2013. Did conception happen nov or dec?

Probably November: Your dates would suggest that you conceived around november 26, 2012. Bear in mind that the accuracy of your dating is probably within plus or minus a week so it is barely possible you might have conceived as late as the first few days in december. Hope this is helpful. ...Read more

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Just had an ultrasound scan at 22.2 weeks and the head circumference is 196mm and the femur is 34mm should I be worried or are these normal?

Just had an ultrasound scan at 22.2 weeks and the head circumference is 196mm and the femur is 34mm should I be worried or are these normal?

Specific details: To answer this one would need to look at graph mapping out the normal range of a head circumference and femur length at this gestational age. No one can do that in their head. The best thing to do is to contact the doctor who ordered the test and ask if these measurements fall within the normal range. ...Read more

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Is it safe to have an elective ultrasound at 14 weeks while extended family is in town? I will have already had 3, including the nuchal scan.

Is it safe to have an elective ultrasound at 14 weeks while extended family is in town?  I will have already had 3, including the nuchal scan.

Yes BUT: Are you having this elective study just to entertain your out-of-town relatives? If so, you should reschedule to the next indicated time as determined by your ob. While there has been no demonstrable bad effects to fetuses by ultrasound, prudent medical practice is to limit exams for only medically appropriate reasons and not entertainment. Your insurance is not likely to cover such exams. ...Read more

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Every ultrasound including my dating scan at 8 weeks has registered my LMP at october 15th 2012, what is the latest date conception could have occured?

Every ultrasound including my dating scan at 8 weeks has registered my LMP at october 15th 2012, what is the latest date conception could have occured?

Within 1 week: Accuracy is within 1 week. So whatever data it is generally 2 weeks after your LMP is +/- 1 weeks in either direction. ...Read more

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From 6-8.5 weeks I've had transvaginal ultrasounds increasing from 132-180. At 9 weeks I had an abdominal scan that showed 158. Cause for concern??

From 6-8.5 weeks I've had transvaginal ultrasounds increasing from 132-180. At 9 weeks I had an abdominal scan that showed 158. Cause for concern??

Heartbeat?: I'm assuming you are talking about the baby's heartbeat? If so, there is no cause for concern. The baby's heartbeat can be quite variable in early pregnancy and this isn't a cause to worry. Best wishes! ...Read more

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I had an ultrasound scan of my gallbladder to check for stones and bloods to check my liver but all were clear. Been in pain for 7 weeks?

I had an ultrasound scan of my gallbladder to check for stones and bloods to check my liver but all were clear. Been in pain for 7 weeks?

RUQ anatomy: Anatomically, right upper quadrant (RUQ) of the abdomen includes: liver, gallbladder, pancreatic head, bile ducts and ampulla, c-loop of the duodenum, stomach antrum and pylorus, the hepatic flexure of the colon. Don't forget the diaphragm and lower chest are pretty close by. The abdominal musculature, ribs, and skin can all contribute as well to localizing RUQ pain. More testing is appropriate. ...Read more

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Had an Ultrasound Scan today. Showed follicle on left ovary. I've to go back 12 weeks to check it's not grown. What is this? Is it cancerous?

Had an Ultrasound Scan today. Showed follicle on left ovary. I've to go back 12 weeks to check it's not grown. What is this? Is it cancerous?

Unlikely: Ovarian cysts/follicles are common and vast majority get better on their own. However, you should keep your appointment for the follow-up test. See this site for more information in this topic.

http://www.mayoclinic.org/diseases-conditions/ovarian-cysts/basics/definition/CON-20019937 ...Read more

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Doc done ultrasound scan on 6 week 3 days seen single IU G-sac. Nd corpus luteum function is their.nd told to come on 8th week.is this Normal.

Doc done ultrasound scan on 6 week 3 days seen single IU G-sac. Nd corpus luteum function is their.nd told to come on 8th week.is this Normal.

Typically: These findings appear to be within normal limits. Not much to see prior to 8 weeks on ultrasound. Follow up as recommended, sooner if concerns or changes in your condition ...Read more

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Undecended right testicle and found seminoma, azoospermia in two samples with in 3 weeks. Left testicle normal in ultrasound scan. Am i sterile?

Undecended right testicle and found seminoma, azoospermia in two samples with in 3 weeks. Left testicle normal in ultrasound scan. Am i sterile?

Possibly: Sorry to hear about your recent diagnosis. Good news is that seminoma and testicular cancer in general almost always curable nowadays especially in early stages. Assuming your semen collections were correctly obtained and tested, complete absence of sperm (azoospermia) implies sterility. Would certainly recommend that this be evaluated further to determine cause especially in view of normal us. ...Read more

Dr. Olga Sarkodie
101 doctors shared insights

Pregnancy Ultrasound (Definition)

Ultrasound had allowed the visualization of internal structures of the body in a non-invasive manner. Ultrasound therefore is a good tool for the evaluation of pregnancies. Pregnancy ultrasound can be performed in all phases of pregnancy. Early ones are mainly used for confirmation of the pregnancy as well as confirming dates. Later ones can identify problems in the organ ...Read more