Best Answer

A 7 week ultrasound would be more accurate than a 13 week one especially if it agreed with your lmp. 13 week babies have plenty of room to move around and sometimes it is more difficult to measure accurately.

2006-09-13 07:00:14
This answer is:
User Avatar

Your Answer


Related Questions

Is an Ultrasound painful?

It is painless. Diagnostic ultrasound (standard ultrasound) is harmless and painless. However it needs to be performed by a specialist (a physician or a radiologist).

During labor after arriving at the hospital is an ultrasound performed?

An ultrasound might be performed if the doctor deems it necessary. However, if the labor is moving rapidly, an ultrasound might not be performed.

Where do i find online ultrasound schools?

There are not many schools that offer online ultrasound schools. However, many of the ultrasound schools offer night and weekend schedules so it is pretty convient to work schedules.

How can you tell if you are having a girl or boy without an ultrasound?

Amniocentesis. However this procedure carries risk that ultrasound does not. Discuss these things with your doctor.

Can an ultrasound detect twins at 5 weeks?

An ultrasound may be able to detect multiple embryos as early as your third week of pregnancy; However, the ultrasound will be most reliable at detecting a multiple or twin pregnancy at around 6 to 8 weeks.

For what purposes would one use a 3D Ultrasound?

The primary purpose of a 3D ultrasound is for a woman to have an extremely clear image of her unborn child to see what it looks like or to determine the sex of the child. However, there are no direct medical benefits to a 3D ultrasound.

Do you fast before a renal ultrasound?

You do not need to be fasting before an ultrasound, however u must drink plenty of fluids, this leaves the kidneys at their largest and easier to see in the ultrasound. Plus by not fasting the kidneys are working like normal while the US is going on.

Is 3D ultrasound safe during the third trimester of pregnancy?

Ultrasound is safe as it does not use radiation such as traditional xrays do. X-rays cannot be done because can cause damage to the fetus. However, ultrasound uses ultrasonic waves that are not harmful and can produce very clear pictures of a developig fetus.

Is it possible to hear baby's heartbeat at 8 weeks pregnant with an ultrasound?

Yes, I went in for an ultrasound on 09/24/09 and they told me I was 6 weeks and 4 days along. the baby's heart rate was 138bpm and I could hear it with the abdominal ultrasound and the transvaginal. However, every pregnancy is different. Godd luck!

What is the medical term meaning meaning recording of an ultrasound?

While an ultrasound examination is being done, there is a visual image that is captured as pictures showing the structures that are being examined by the sound wave technology. These video-taped images are recorded by the technologist performing the ultrasound so that a physician can review the images and interpret the test results for diagnostic purposes. In pregnancy, ultrasound "pictures" are taken of the fetus and these are recorded for the same reasons above, however, these recordings are also provided to the pregnant woman as her very first "baby" pictures.

At which month can a ultra sound show twins?

The best and most reliable way to confirm a twin or multiple pregnancy is to see it with an ultrasound. An ultrasound is the only guaranteed way to know whether you're carring more than one baby. An ultrasound may be able to detect multiple embryos as early as your third week of pregnancy; However, the ultrasound will be most reliable at detecting a multiple or twin pregnancy at around 6 to 8 weeks.

Why does the patient need to drink plenty of water before undergoing ultrasound?

Two ultrasound exams that would benefit from drinking water prior to the exam would be a transabdominal pelvic ultrasound (different than a transvaginal pelvic ultrasound) and a transabdominal ultrasound to focus just on the pancreas. The reasoning behind ingesting water for the pelvic ultrasound is so that the bladder will be full and during the exam the full bladder acts as a window to visualize the pelvic organs which sit behind the bladder. The fluid filled bladder allows the soundwaves from the ultrasound machine to to be enhanced as they travel through to the pelvic organs. A full bladder also pushes intestinal gas out of the field of view as well. The transabdominal exam is typically followed by the transvaginal ultrasound. The patient should empty their bladder after the transabdominal pelvic ultrasound and before the transvaginal ultrasound. A full bladder would actually interfere with a transvaginal ultrasound. The other exam that would benefit from ingesting water would be a transabdominal scan of the pancreas. Typically the pancreas is imaged within an abdominal ultrasound. However, ingesting water would interfere with imaging the other organs typically seen in this exam. So the pancreas should be visualized last and immediately following the patient drinking 8 oz. of water. The reasoning behind this technique is that the fluid filled stomach acts as a window to visualize the deep pancreas, similar to the reasoning behind having a full bladder for a pelvic ultrasound.

What are the limitations of ultrasound in genetic testing?

This procedure, however, cannot detect biochemical or chromosomal alterations in the fetus.

In which week you know about pregnanca having twince?

It is possible for the doctor to tell when they do the first ultrasound, at about 10 weeks. However, twins can be tricky and some will hide behind the other. In general though, you can tell at about 10 weeks with the first ultrasound.

Is ultrasound technician training helpful?

Ultrasound technician training is very helpful and can help you find a good job. However, make sure you find a credible training school because many times they can be teaching you the wrong things.

Can anything be seen at 2-3 weeks pregnant on an ultrasound?

Generally, the answer is NO. However, during weeks 3 and 4 when the gestational age (or fetal age) is 2 weeks, the earliest change that can be seen with a vaginal ultrasound is the "decidual reaction" which is the thickening of the endometrium. The endometrium lining thickens as the blastocyst burrows into it. This cannot always be detected by ultrasound-sometimes it may take a special eye or hi-resolution equipment to see this "reaction" in the endometrium lining at that very early stage. And remember that when using ultrasounds, it is the transvaginal ultrasound which can detect development in the uterus about a week earlier than a transabdominal ultrasound.

You were 16 weeks pregnant your ultrasound said that the baby size was 18 weeks which one should you do by?

The ultrasound dating has excellent and precise estimation of gestation especially if done in the first trimester (first 12 weeks). After 12 weeks, its accuracy goes down. However, compared to dating according to menstrual cycle, the ultrasound would be more accurate.

What is the average ultrasound technician salary?

There is a slight increase in salary for the ultrasound technician, and also the hours will be much better. Sometimes money isn't the only deciding factor, follow your heart and go for it.

Can an ultrasound determine if you have prostate cancer?

No. Ultrasound is used to guide the biopsy needles however. It is only by the biopsy that cancer can be detected. Recent advances are showing progress with a urine sample showing the presence of cancer. But this technique is not yet widely available.

Does ultrasound detect fibrosis and cirrhosis of the liver?

Ultrasound can aid in the detection of fibrosis and cirrhosis of the liver, by measuring how ecogenic the liver is (the more it "echo's" the greater the scarring). However any findings still have to be validated by a biopsy, before a diagnoses can be confirmed.

You are 8 weeks pregnant and had a ultrasound last week when you were 7 weeks they couldn't see the baby Is it normal not to see the baby in a 7 week ultrasound?

It is possible that your health care provider will be able to detect your pregnancy on an ultrasound as early as your fifth or sixth week of pregnancy. However, the sac containing your baby and its heart is so small at this stage that it will probably be difficult to detect. Sometime around the 8th week of pregnancy is the best time to start being able to see your baby on an ultrasound.

Why is ultrasound not used to produce images of the brain?

Neurosonography is a small, specialized section of ultrasound, frequently used in the NICU on premature babies. Images of the brain are able to be produced on premature and young babies due to the skull not being fully fused together yet, therefore allowing the ultrasound beam to reach the brain tissue. Neurosonography is also used before the baby is born, and still in the mother's womb. Once the skull has fused, transcranial ultrasound is still possible to an extent, through very small openings within and around the skull. This area of ultrasound is frequently used in high risk pediatric and specialty hospitals, such as St. Jude Children's research hospital. Using ultrasound on the brain of a fully fused skull is more challenging because an ultrasound beam cannot penetrate through bone. However, with skill and knowledge, it is possible to obtain brain images.

How do doctors determine that you are expecting twins?

Generally from the ultrasound, when there is more than one baby. However, before the ultrasound there can be some indicators, such as pregnancy symptoms being stronger than normal or your abdomen getting bigger earlier on in the pregnancy than it usually would

You had a ultrasound at 18 weeks and the US tech said she was 85-90 sure it is a girl - she showed us 3 lines - do you think that her conclusion is accurate?

Assuming she is qualified and experienced at her job she is probably right. However the ultrasound is not 100% accurate.

Where can I find online programs for ultrasound technician training?

One place to look for an online ultrasound technician training program is Allied Health. DeVry University is also a school to look into. However, it is more difficult to get this type of degree completely online as it does require hands-on study.