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Yes, don't worry about the difference.
By 4 weeks, a fetus cannot be seen but the thickening of the uterine lining can be detected. By around 5 weeks, an ultrasound can almost always confirm that you are pregnant.
Between four and a half to five weeks, the gestational sac is easily seen and can be measured, since the average growth is 1mm per day at this time but not completely uniform this information is considered a tentative date when LMP date is not known.
A few weeks later Ultra Sound to determine fetal age is done by taking a measurement of either the femur (longest bone in the body) or the crown of the head to the pelvis called the "crown rump". The measurement is taken and automatically then by comparing your baby's measurements to the data from a large collection of measurements, the ultrasound can then tell how far along your baby is.This is most accurate between week 7 and week 14.
Doctors have fallen into using a rule in ultrasound that when the due date based on ultrasound doesn't vary from the mother's dates by more than a week, stick with the mother's dates; if the ultrasound disagrees by more than a week to ten days, it becomes wiser to rely on the ultrasound.
Later in pregnancy other things such as babies who are larger than average size, babies growing at different rates among pregnancies, will cause inaccurate dating of pregnancy. But are still an excellent tool for other issues that may develop.
The bottom line is, Ultra Sound is a machine made and run by humans, it is an amazing tool for many things, but babies are still going to come into this world when they are ready, regardless of dates. Only 5 to 10 percent of babies arrive on their due date, whether the date is by ultra sound or LMP.
What else can I help you with?
How can you be sure that you become pregnant?
You can get a blood test done, which is more accurate than a home urine test. Also, an ultrasound test can be done to actually see the pregnancy.
Can an ultrasound tell you exactly how many weeks and days you are pregnant?
It's not an exact science, but it can give you a pretty good idea. the less pregnant you are the more accurate it is. ~pawsalmighty
Is it true that you can do an ultrasound can show that your not pregnant even if you are pregnant?
Ultrasound can visualize fetus inside with no errors.
When is ultrasound needed?
When your pregnant
If you are pregnant and your blood work says you are further along than your ultrasound which one is more accurate?
Blood work cannot tell you how far along you are as the levels vary so much from pregnancy to pregnancy, go with the ultrasound.
Are there any uses of ultrasound in medicine?
yes when you get an ULTRASOUND when your pregnant it use ultrasound waves to show the image.
Had an ultrasound yesterday. LMP was Nov 2 so you should be 7 weeks The ultrasound only showed you being 5 weeks pregnant you are going back next week for another ultrasound Should you be worried?
You have two due dates...one accourding to your last period and one accourding to the size of the child on the ultrasound...i think the ultrasound one is more accurate
How long after a woman is pregnant can she find out what gender baby she is having?
A woman can have an ultrasound to determine the baby's sex as early as 15 weeks. However, an ultrasound is not 100% accurate - the only way to be 100% accurate is to have an amniocentesis, which is a risky procedure that a doctor won't perform just to determine the baby's sex.
How do you know if your pregnant with a girl?
by ultrasound..
What is the gel stuff that they put on a pregnant woman's belly before they have an ultrasound?
Ultrasound gel
What is the scan called you get when you are pregnant?
It is an ultrasound scan.
Can a horse get you pregnant?
take it to the vet; they will do an ultrasound
