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Doctor insights on: Ultrasound

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How accurate are ultrasounds in determining due date?

How accurate are ultrasounds in determining due date?

Depends on dates: The ultrasound (us) is the most accurate way we have of deciding how pregnant you are. There is a variation in us accuracy due to how we measure and who is measuring, but the accuracy is about 3-4 days before or after the measured size until about 10 weeks, plus or minus a week to about 14-15 weeks, then gradually changing up to a 3 week range in the last 2 months of pregnancy. ...Read more

Dr. Michael Gabor
2,190 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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Could the ultrasound be wrong about my baby's sex?

Could the ultrasound be wrong about my baby's sex?

Yes and no!: Depending on how early an ultrasound is done on a pregnant women, the more inaccurate the results on gendering will be. If done later, ie. After six months, they are very accurate. ...Read more

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Why is an ultrasound used in physical therapy exactly?

Why is an ultrasound used in physical therapy exactly?

Stimulation: Ultrasound is a stimulator. It helps stimulate tissue regeneration and increase blood supply to the affected area(s). It does have pain relieving properties as well. ...Read more

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What is 3d fetal ultrasound?

What is 3d fetal ultrasound?

New computer softwar: New computer software allows for the individual planes acquired during regular prenatal ultrasound scanning to be collated, manipulated and illustrated in a three-dimensional fashion for the uninitiated couples to be able to effortlessly visualize their unborn baby. It provides few/no significant advantage over traditional 2d prenatal ultrasound for the experienced physician/sonographer. ...Read more

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What is a transvaginal ultrasound?

What is a transvaginal ultrasound?

Sono in vagina: It is an ultrasound done by placing the probe into the vagina to allow a more accurate view of the pelvic anatomy. ...Read more

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We thought I'm at 10w3 d, but ultrasound measures 5.03CRL and 11w6d. could this be correct?

We thought I'm at 10w3 d, but ultrasound measures 5.03CRL and 11w6d. could this be correct?

Yes: Early ultrasounds are very reliable for dating. The traditional method of dating from the first day of the last menstrual period is less so since ovulation may occur earlier or later and conception can occur a couple of days after ovulation. Hope this helps. ...Read more

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I was curious how far along i'd be if the ultrasound said 6.5 cm/1.3/27 Hz at the top of my picture. ?

I was curious how far along i'd be if the ultrasound said 6.5 cm/1.3/27 Hz at the top of my picture. ?

Sorry Mildred,: those numbers are most likely related to the ultrasound settings, (Depth/gain/frequency) Ask your OB or sonographer for your dates or measurements. In early pregnancy we measure crown-rump-length (CRL). Later, the fetal head diameter (biparietal diameter or BPD) from "ear-to-ear." Also look for abd. circumference (AC), head circum. (HC), or femur length (FL) since these are used more often. ...Read more

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Are baby gender ultrasounds accurate? Is there any chance that an ultrasound showing my baby's gender is wrong? I'd hate to completely prepare for a b?

Depends on variables: I would never decorate my nursery based on a baby gender ultrasound. Those done around 20 weeks are likely to be accurate in the hands of a skilled technician, but the boy parts must decide to show themselves or they may be overlooked.I've heard of more moms being surprised by boys than girls. ...Read more

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Is it ok to have early ultrasounds?

Is it ok to have early ultrasounds?

Yes: The safety of ultrasound is well established and an early ultrasound is the most accurate for confirming a due date. Usually one first trimester sonogram for dating and a formal anatomy survey in the 2nd trimester are fairly routine. Additional sonograms may be performed for nuchal translucency screening or complications that develop in the pregnancy. ...Read more

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