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Doctor insights on: 14 Week Fetus

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Is a 14 week fetus different from a 18 week fetus in measurement?

Yes: There is a very significant difference in the measurements at these ages. ...Read more

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What is the range of accuracy for an 11 week abdominal ultrasound? Possible to mistake an 14-15 weeks fetus for an 11 week fetus? Crl measured 45mm.

What is the range of accuracy for an 11 week abdominal ultrasound? Possible to mistake an 14-15 weeks fetus for an 11 week fetus? Crl measured 45mm.

Sono reliable: For dating pregnancy, an ultrasound at the stage you define is a very good time to do so. A fetus that demonstrates cardiac activity and appears to be 11 wks by crl is reliably 11 weeks. That's one reason for doing ultrasound. Abdominal ultrasound of the fetus at this stage does have limited accuracy with regard to fetal anatomy, but dating should be quite reliable. ...Read more

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What's the size difference between 14 week and 18 week fetus?

About double: At 14 weeks a fetus is about 3.5" from head to butt, and around 5.5" at 18 weeks, almost twice as long. We don't measure head to toe since they are rarely stretched out like that for more than a moment. ...Read more

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Can a 9 week fetus look 7 weeks?

Maybe but not likely: You have to understand that the usual way to date is weeks from the menstrual period, which is presumed( but not always )2 weeks from conception. But, if a good ultrasound is done and the first third of pregnancy, it should be accurate to within 5 days, not 2 weeks off! if within 5 days, they way still go by the menstrual period or probable date of conception... Talk to your ob! hope this helps. ...Read more

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Can an eight week old fetus die?

Can an eight week old fetus die?

Yes: A fetus can be lost on any day of a pregnancy due to a number of reasons. ...Read more

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Do all fetus look the same at 7 weeks?

Yes :-): That's a great, and interesting question. Having performed hundred of ultrasounds at this gestational age, I have to say, they pretty much all look alike. Unfortunately the magnification abilities of most ultrasounds are limited, so even if they looked different i wouldn't necessarily be able to detect. Interesting question though! ...Read more

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Is normal not to see a fetus at 5 weeks ?

Is normal not to see a fetus at 5 weeks ?

Yes: At early 5 week ultrasound you may only see a gestational sac, nothing more. ...Read more