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Doctor insights on: Fetal Gestational Age

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When a fetus is "measuring small" how is that determined? Wouldn't it just mean that the fetal / gestational age is off?

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

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I am 29 weeks pregs. Fetal gestational age is already above 31 weeks. But my uterus size is only 27-28 weeks. I hope things are normal. Pls advice?

I am 29 weeks pregs. Fetal gestational age is already above 31 weeks. But my uterus size is only 27-28 weeks. I hope things are normal. Pls advice?

Unclear: From your information it looks like the uterine size is appropriate for your gestation. I'm not sure what you are referring to as gestational age. If there is a question a sonogram should be able to accurately asses growth. ...Read more

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Do ultrasounds measure fetal or gestational age? And how accurate are they at 7 weeks 5 days?

Do ultrasounds measure fetal or gestational age? And how accurate are they at 7 weeks 5 days?

Yes. "Accurate".: Ultrasound pregnancy dating scans measure fetal size or age (time since conception), and convert the measurements to human gestational age. Gestational age is calculated by adding 2 weeks to the age of the fetus (to the time since conception), and roughly represents the total weeks since the first day of the last menstrual period (LMP). All dates are ESTIMATES, so 7w 5d means about 7w to 8w 3d. ...Read more

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What's the difference between fetal age and gestational age?

What's the difference between fetal age and gestational age?

Minor: Gestational age refers to the length of time since the first day of your last period. Fetal age refers to the age of your developing baby, counting from the estimated date of conception. ...Read more

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I'm 34 weeks & 4 days. Is that gestational age / fetal age?

I'm 34 weeks & 4 days. Is that gestational age / fetal age?

Likely gestational: Most of the time pregnancy is described in terms of gestational age. This is of historical relevance because prior to the invention of imaging technologies the most reliable mark of timing of pregnancy was the first day of the last menses. Ovulation occurs 14 days thereafter on the average. So fetal age is two weeks less than the menstrual or gestational age. ...Read more

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I was told a baby's heartbeat doesn't beat until 5 weeks, is that 5 weeks gestation or fetal age? and how likely is it to see heartbeat at 5w 4d?

I was told a baby's heartbeat doesn't beat until 5 weeks, is that 5 weeks gestation or fetal age? and how likely is it to see heartbeat at 5w 4d?

Very likely to see: At 5 weeks 4 days you will see a heartbeat. Before that it is a question of when can you see the heart beating and that has a lot of variables. Usually before 5 weeks it is not common to see but not impossible. ...Read more

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How does gestational age impact fetal weight?

Fetal age and weight: As a normal fetus increases in gestational age, it normally will also increase in fetal weight. ...Read more

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At what gestational age of fetus should the bpd measure approximately 4.1cm (41mm)?

At what gestational age of fetus should the bpd measure approximately 4.1cm (41mm)?

BPD: Well we use more than just bpd to calculate the gestational age. Head circ., femur length, and abdominal circ. Also go into the calculation. However, 4.1cm bpd is consistent with about 17 weeks 4 days. ...Read more

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If its said that a 12 week old fetus measures 57 mm, than what is the gestational age of a fetus measuring 62mm?

If its said that a 12 week old fetus measures 57 mm, than what is the gestational age of a fetus measuring 62mm?

12+4 weeks: Crown-rump length in fetus: 57 mm= 12+2 ( 50%) weeks, 62mm= 12+4 (50%) weeks reference: http://www.Bmus.Org/policies-guides/23-17-3-161_ultbmus.Pdf. ...Read more

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Why are fetal measurements measured by weeks plus days and not just by weeks? Are the # of days just as important to determine gestational age?

Why are fetal measurements measured by weeks plus days and not just by weeks? Are the # of days just as important to determine gestational age?

Precision: By convention gestational age is stated in weeks. For precision and accuracy weeks and days are usually indicated when specifying a gestational age. For example, some tests may be done at 15 weeks but not at 14 weeks and 6 days - so the number of days is important as well. ...Read more