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You had an ultrasound and the baby was dating 26 weeks when in fact conceived 24 weeks and 5 days before based on your lmp you should have been 26 weeks 5 days was the measurement from your edc or Lmp?
Wiki User
∙ 18y ago
At this stage there is so much variation in babies sizes that 10 days difference is not important. EDC is based on LMP by the way, it may be adjusted at an early (before 12 weeks) scan, but not at 26 weeks.
Wiki User
∙ 18y ago
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When given a dating ultrasound do you need to subtract two weeks for an actual date?
When you have a dating ultrasound you are given an EDD (estimated date of delivery) If you count back 40 weeks from this date it should be about when your last period was. If you do not have a regular cycle they may not correlate exactly. 38weeks back from your EDD is approximately when you conceived.
What does BPD mean on ultrasound?
Biparietal diameter (BPD) is the diameter across the developing baby's skull, from one parietal bone to the other. The measurement is useful in dating the pregnancy and estimating fetal weight after about 13 weeks of pregnancy.
Describe the similarities between measurement of time with a calendar and measurement of time by radiometric age dating?
pangit!
You were 16 weeks pregnant your ultrasound said that the baby size was 18 weeks which one should you do by?
The ultrasound dating has excellent and precise estimation of gestation especially if done in the first trimester (first 12 weeks). After 12 weeks, its accuracy goes down. However, compared to dating according to menstrual cycle, the ultrasound would be more accurate.
Can you count back the weeks of your pregnancy from a dating scan to see when you may have conceived if your LMP is unknown?
I just had a child and I had no idea when my last MP was or when around he was conceived, but if you know already how old around the fetus is, then you can get somewhat of an idea, but it won't be exact. Yes. If you count back two weeks less than the length of your pregnancy, that is approximately when you conceived. For example if your dating scan says you are 10 weeks pregnant, counting back 8 weeks will give you your approximate date of conception.
Why is radiometric dating the most reliable method of dating the geologic past?
Radiometric measurement is based on the decay of certain elements, the rate of which is a known scientific fact.
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The age of an object that was once living.
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