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A member asked:
Is gestational age counted from conception?
3 doctors weighed in across 2 answers
LMP: By tradition, it is calculated from the first day of the menstrual period which led to the pregnancy.
Answered 3/26/2013
5.4k views
Yes It Is: Since it is difficult to know exactly when fertilization occurs in vivo we estimate it based on calculation of the estimated due date (and by proxy gestational age). This is calculated by adding 280 days to the first day of the last menses the accuracy of which depends on recall by the mother, assumes regular 28 day cycles with conception at day 14 (ovulation).
Answered 8/22/2013
5.4k views
Related Questions
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Even though ultrasounds go by gestational age, can you still get pregnant within that 2 weeks of gestational age they don't count as conception age?
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How can conception date determined by early trans u/s done at 6 weeks 3days be accurate if you can still get pregnant w/in the 2 weeks of gestational age?
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Do ultrasound measure from conception age or gestation age?
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Can 1st trimester u/s be off 3 weeks in gestational age and in conception? (1st trimester) even if they have been pretty consistent in the pregnany
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A member asked:
Gestational age dates back to around my conception date. March 24th last period 14 days after would be April 7th. My GA dates back to the 8th. Why?
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People also searched for:
On 12/10/12 my gestational age was 8weeks with an estimated LMP to be 10/15/12. Whenwas the latest date that conception could have happened?
Is conception usually two weeks after gestational age from ultrasound?
Why does my ultrasound match my (estimated) date of conception rather than my gestational age?
Would early ovulation causing early conception show in the gestational age since not all woman ovulate 14 days after lmp?
If conception date assumes you don't count the first 2 weeks of gestational age, is it still accurate if you don't have an average 28 day cycle?
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