Question 1

how accurate is ultrasound done at 20 weeks for gender determination of fetus. is obstretics ultrasound with same accuracy. same question for 22 wks?

Accepted Answer

Mostly accurate: Ultrasounds at that point in your pregnancy is generally accurate.  Remember, however, that the presence of a penis to diagnose a male is generally easier than the lack of one to diagnose a female.  As one of my teachers once observed, "some boys are shy".

Question 2

what individual fetal measurement holds accuracy (represents true gestational age) longest in pregnancy (fl, ac, bpd, hc)?

Accepted Answer

Must use averages: I don't believe that any single measurement is most accurate throughout pregnancy. It is usually the averages that are taken. The most accurate measurements are actually in the first trimester in the way of the crown rump length in terms of predicting the estimated date of delivery.

Question 3

what fetal measurement on ultrasound holds accuracy the longest in pregnancy?

Accepted Answer

Typically the first: The ultrasounds performed in the first trimester I have the most accuracy and will hold the accuracy throughout the pregnancy. That is unless there are developmental problems during the course of the pregnancy. The error range for first trimester ultrasound is plus or -5 days. This can extend to several weeks during the third trimester.

Question 4

is ultrasound dating the same accuracy for twins or multiples as
it is for a single fetus ?

Accepted Answer

Early sono: is very accurate at helping confirm the correct due  date, so should be good at discerning timing for delivery. Single or multifetal pregnancy, it works very well.

Question 5

what's the most accurate, the crl or the fl,ac, hc ? which one gives you the most accurate fetal age ? what are the errors?

Accepted Answer

All of the above.: I am not an Obstetrician, but as I understand it, no one measurement is "most accurate" for fetal age. That is why all are measured together - some sort of average of all the measurements is the best indicator of gestational age. Every baby is different, &amp; due to genetics some babies will have larger heads for a given age, others will have long legs. So doctors follow growth of all parts over time

Question 6

how does a fetus breathe?

Accepted Answer

Thoracic movements.: Here are two answers to your tricky question: 1) fetuses do not literally breathe; they have increasingly frequent thoracic movements near term to prepare for extrauterine life without actually exchanging gases through their lungs. 2) gas exchange in utero is via the placenta (not the lungs); the fetuses obtain the required oxygen through placental function and complex hemoglobin interactions.

Question 7

does the fetus feel hunger?

Accepted Answer

Probably not: The fetus gets its nourishment from the umbilical cord. Though it swallows amniotic fluid frequently, we have no way of knowing if it is hungry...

Question 8

what does gross fetal mean?

Accepted Answer

Fetal movement: Gross fetal movement is a term for movement of the fetus that is visualized on ultrasound.

Question 9

when is the baby called fetus?

Accepted Answer

9 wks until birth: In most medical circles the terminology of reproduction is well defined. From the point of conception to the end of the eighth week, a series of complex events take place that are described as the embryonic period. As the 9th week starts, the embryo has achieved a form that is recognizable as human and the term fetus is used from that point until delivery.

Question 10

does a fetus show in an x-ray?

Accepted Answer

Later in pregnancy: A fetus with enough calcium in his bones will show up in a regular x-ray.

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Doctor answers about:

Hc fetal accuracy

A member asked:

How accurate is ultrasound done at 20 weeks for gender determination of fetus. is obstretics ultrasound with same accuracy. same question for 22 wks?

A member asked:

What individual fetal measurement holds accuracy (represents true gestational age) longest in pregnancy (fl, ac, bpd, hc)?

A member asked:

What fetal measurement on ultrasound holds accuracy the longest in pregnancy?

A member asked:

Is ultrasound dating the same accuracy for twins or multiples as it is for a single fetus ?

A member asked:

What's the most accurate, the crl or the fl,ac, hc ? which one gives you the most accurate fetal age ? what are the errors?

A member asked:

How does a fetus breathe?

A member asked:

Does the fetus feel hunger?

A member asked:

What does gross fetal mean?

A member asked:

When is the baby called fetus?

A member asked:

Does a fetus show in an x-ray?

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