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Doctor insights on: How Accurate Are Pregnancy Scans

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How accurate are online scan pregnancy test?

How accurate are online scan pregnancy test?

Urine test is better: Testing one's urine is so simple and so accurate that there is no reason to bother with an online survey. An online test cannot give a definite answer (it has no sample of one's blood or urine), so it can only make a guess (hopefully and educated guess). ...Read more

Dr. Harinder Gill
4 Doctors shared insights

Pregnancy (Definition)

When your due date arrives, you will be more than ready to have your baby! Most women deliver the baby somewhere between 37 and 42 weeks. According to the American College of Obstetricians and Gynecologists, only 5% of babies arrive on the exact due date. Approximately 7% of babies are not delivered by 42 weeks, and when that happens, it is referred to ...Read more


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How accurate are ultrasound scans in pregnancy?

How accurate are ultrasound scans in pregnancy?

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 verify the placental location, fetal position & head size (to verify dates), simple equipment works ok. Specific things about baby like heart anatomy, facial features and the like, require a skilled technician using special equipment & interpretation. ...Read more

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Is a pregnancy scan accurate on weeks that you are not?

Is a pregnancy scan accurate on weeks that you are not?

LMP dating vs US: Both methods have some error. Us dating is most accurate between 8 and 13 weeks using the crown rump length of the fetus.

If us and LMP dating are different by more than 2 weeks, the accuracy of LMP dating should be questioned.

Making sure interval growth is appropriate at your doctor checkups and the fetal anatomy ultrasound is complete is what you want to see. ...Read more

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Is my 6 week pregnancy scan more accurate or my 12 week scan to when I conseived?

Is my 6 week pregnancy scan more accurate or my 12 week scan to when I conseived?

The earlier the bett: Although, earlier scans appear to be more accurate, the difference between 6 and 12 weeks should not be striking. ...Read more

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Do pregnancy dating scans provide accurate results?

Do pregnancy dating scans provide accurate results?

Yes: Early or 1st trimester ultrasound is generally an accurate way to date pregnancy. However, the further along the pregnancy is, the less accurate the dates. ...Read more

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Do you really need to know your LMP or is a dating scan an accurate enough way to see how far gone you are in pregnancy?

Do you really need to know your LMP or is a dating scan an accurate enough way to see how far gone you are in pregnancy?

US is enough: An early dating scan in the first trimester of pregnancy is quite accurate for determining how far along someone is in her pregnancy. It is especially useful for those who are uncertain of their LMP or who have irregular cycles. While not exact, the dating scan is usually accurate within a few days of the actual gestational age. ...Read more

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How accurate is a dating scan performed at 13 weeks pregnancy?

How accurate is a dating scan performed at 13 weeks pregnancy?

Should be ok: Dating ultrasound scans have good accuracy at 8-11 weeks, so one done at 13 weeks should still be reliable. Dates by ultrasound are always estimates. ...Read more

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In early pregnancy LMP or ultrasound is accurate? Scan showing 4W6d and as per lmp it is 5W2d, saw sac and tiny yolk sac. Need to worry? : (: (reg perds

In early pregnancy LMP or ultrasound is accurate? Scan showing 4W6d and as per lmp it is 5W2d, saw sac and tiny yolk sac. Need to worry? : (: (reg perds

3 day difference: All tests have error bands. You report a three day difference in two methods of estimating your fetus' gestational age. The key word in that sentence was estimating. Try to relax and enjoy your pregnancy and future baby. ...Read more

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My scan says 7 weeks 3 days crl 11.8mm is this accurate for this gestation?

My scan says 7 weeks 3 days crl 11.8mm is this accurate for this gestation?

Yes: The crown rump length is the standard measurement used in the first trimester. As a reference when the crown rump length (crl) is. ...Read more

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If accuracy of scans r supposed to be excellent in 1st trimester, particularly at 8-10 weeks gestation, then why is there an error margin of +/- 7dys?

Math: There is a margin of error in everything is life. In sonography the margin exists because of the mathematics involved in measuring a fetus and then applying those measurement to standardized algorithms that establish the gestational age. The further along the wider the margin or error as one fetus begins to individualize. ...Read more

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How early can a scan detect pregnancy?

How early can a scan detect pregnancy?

Around 5 weeks: Very early changes may be seen by 5 weeks but fetal heart activity will reliably be seen by 7 weeks (on transvaginal scans). ...Read more

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How early in pregnancy can you have a scan?

How early in pregnancy can you have a scan?

Depends on purpose: If the goal is to look at baby for seeing normal fetal anatomy, the earliest would be 18 weeks. This allows the m ajor organ systems to be formed to the point of being able to be evaluated. Before 18 weeks the heart has not finished forming and therefore a scan performed prior to this date does not really look at the normally formed fetal heart but a precursor. ...Read more

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When is a home pregnancy compeletly accurate.?

When is a home pregnancy compeletly accurate.?

When used as directe: Home pregnancy tests are only accurate when used as directed. This typically means waiting until you've missed your first period or 4 weeks after your last one. Obviously, you then have to follow the directions for use & interpretation. Yes, they can be falsely negative but it's unlikely the further out you are from your lmp. It's even less likely for them to be falsely positive. ...Read more

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What is the most accurate way to date a pregnancy?

What is the most accurate way to date a pregnancy?

Pregnancy: If your periods are normal and you are certain of the date of your last menstrual period, you would just usually count the weeks from then on, if there is uncertainty then an ultrasound will be able to tell. Good luck! ...Read more

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Is pregnancy always accurate? ? If yes how to do it?

Is pregnancy always accurate? ? If yes how to do it?

PREGNANCY: After missing your period and sometimes you have am sickness, do pregnancy test? After first trimester or second trimester do pelvic ultrasound to find out age of baby. Your OB will guide you. ...Read more

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How to tell if my symptoms of pregnancy are accurate?

How to tell if my symptoms of pregnancy are accurate?

Determine if you are: Pregnant w a pregnancy test - not by symptoms. Classic pregnancy
sxs begin when period is missed or thereafter (6-8 wks). Sx’s can include: tender /swollen breasts, nausea or vomiting; lack of period; ^ frequency of urination; headaches, insomnia, fatigue. Moodiness, mild cramping, food cravings & aversions; passing gas; enlarging waist line & ^ white, milky vaginal discharge. ...Read more

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Symptoms of pregnancy at 1 week and can a test be accurate?

Symptoms of pregnancy at 1 week and can a test be accurate?

Not 100% clear: What you mean by pregnancy at 1 week, but if you mean you think you conceived 1 week ago, I'm sorry the answers are 1) no and 2) no. There are no reliable symptoms at all, and a test will not be accurate, too early for both. Good luck. ...Read more

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Which is more accurate quickvue or first response for detecting pregnancy?

Which is more accurate quickvue or first response for detecting pregnancy?

Equally: Both tests are equally good despite what the companies' adverts might suggest. In fact, both of the urine based tests are essentially as accurate as the more expensive blood tests to answer the question - "am I pregnant"? ...Read more

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What months or weeks of pregnancy will scan be able to tell the sex of my baby?

What months or weeks of pregnancy will scan be able to tell the sex of my baby?

Varies: Although the external features are in place by 12 wks after conception, many don't feel confident in making that determination until 18-20 wks. Even then, the cooperation of baby is needed to make the best determination. ...Read more

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How far in pregnancy are you if foetal pole is measuring 1.8mm at first scan please?

About 5.3 Weeks: At 2mm we would say 5.3 weeks (from the last period) so 1.8 mm would be closest to that value. ...Read more

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What is the best home pregnancy testnon the market that will give me accurate results?

Home Pregnancy Test: Best home pregnancy test

according to scientific studies and reviews, first response early result pregnancy test is the most sensitive and reliable home pregnancy test on the market. ...Read more

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Dr, is it necessary to do NT or quadruple scan in pregnancy? If we found any defect in baby is there any medicine to solve the defects?

Dr, is it necessary to do NT or quadruple scan in pregnancy? If we found any defect in baby is there any medicine to solve the defects?

Its elective: Some of the issues associated with Down's syndrome and spina bifida require specialty hospital/surgeons to be available, so knowing the results ahead of time will allow your physician to either have you deliver at those sites or consult someone before delivery ...Read more

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How accurate are pregnancy tests?

How accurate are pregnancy tests?

See below: When performed correctly they are extremely accurate, reliable and valid. ...Read more

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Are OTC pregnancy tests accurate?

Are OTC pregnancy tests accurate?

Yes: Home pregnancy tests are accurate, reliable and valid. They become positive when you're about 1 week late. If they're negative at that time, repeat in 1 week. ...Read more

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How accurate is the pregnancy test?

How accurate is the pregnancy test?

Depends: A blood pregnancy test is very accurate. A urine pregnancy test less. A urine pregnancy test can show a negative result when you are pregnant and very rarely a positive result when you are not. Also blood and urine tests can be both negative despite a pregnancy if the test is done too early. ...Read more