Doctor insights on:
Measuring Larger Than Gestational Age
Half bigger/smaller: If you look at the size of babies at any point in pregnancy, the average defines a point where half are bigger & half are smaller. In some respects it is comforting as baby must be getting good nutrition through the placenta. It will bare watching because baby size at the time of delivery may prevent vaginal delivery. I have seen babies 11-15 lb at birth & that can be a problem. ...Read moreSee 1 more doctor answer
No.: That is close to an 11 week fetus. Far too large for an 8-9 week gestation. ...Read more
Can 12 week dating scan be off by 2 weeks? Could a 10 week gestational age fetus measure as big as 5.6cm?
Yes: Ultrasound scanning is related to the skill of the sonographer. Typically a 10 week scan has three days of error built in when the test is performed vaginally. There is more error with an abdominal ultrasound. Average crown rump length at ten weeks is approximately 3-4cm. ...Read moreSee 1 more doctor answer
Is a gestational age reading accurate on a 10 week ultrasound? And what exactly are they measuring?
If its said that a 12 week old fetus measures 57 mm, than what is the gestational age of a fetus measuring 62mm?
When a fetus is "measuring small" how is that determined? Wouldn't it just mean that the fetal / gestational age is off?
Yes and no: Yes, if the gestational dates are off. No, if they are not and the biparietal diameter of the fetus does not "measure up" to the appropriate age indicating "small for gestational age or intrauterine growth retardation.". ...Read more
Before I miscarried my ultrasound read: Gest Sac: 29 mm 8w 0d CRL: 4 mm 6w 1d +/- 0w 4d Could I have a COMPLETE molar pregnancy? Or is only partial an option? My gestational sac was measuring large and a crown rump length was measured.
Hard to answer: Ultrasound features – Partial moles are often indistinguishable from complete moles on ultrasound. However, demonstration of fetal parts favors the diagnosis of a partial mole. Histological analysis of the aborted tissue is usually helpful in confirming the definite diagnosis. Your case demonstrates significantly enlarged sac which may happen with any molar pregnancy. ...Read more
Everything was going well an last week i was told he is larger than his gestational age? Could we be further along ?
Possibly: More than likely you had an established due date at the beginning of the pregnancy. That is usually the most accurate dating. Once you are given a due date from the first trimester comparing your ultrasound and last menstrual period your due date should not change. So unlikely that you are further along. ...Read more
Can the reading of a 10 week gestational age be wrong? Is it possible that the crown can be larger than other fetuses?
Yes: Prenatal ultrasounds are not 100% accurate. Readings also depend on the training and experience of the tech and the ob. Ultrasonography cannot detect certain anomalies in the fetuses. There have been cases when fetuses have been aborted to find out, in the post-mortem, that they were perfectly normal. But, ultrasound remains a great diagnostic tool and many lives have been saved by it. ...Read moreSee 1 more doctor answer
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