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A member asked:
By lmp i am 7w4d today. u/s 2 weeks ago told me turning 5w. only sac, baby barely visible. today, fetal pole and hb but baby measuring 5w6d. problem?
5 doctors weighed in across 2 answers
First trimester date: Depends on what the heart rate is. Assuming a normal heart rate, it is likely just that the ultrasound is more accurate at dating your pregnancy. Dating by LMP assumes a 28 day cycle with ovulation on day 14. Not all women have that cycle interval, making first trimester ultrasound more accurate in most cases.
Answered 2/13/2015
5k views
Very early US dating: Not as good as us between 7-13 weeks. Measuring the fetal length (called a crown rump measurement) is the most accurate. The good news is interval growth, including a fetal pole with cardiac activity. Another followup us in 3-5 weeks could confirm additional interval growth and measure the crown-rump distance to re-evaluate dates.
Answered 7/26/2013
5k views
Related Questions
A member asked:
Hi my LMP was on 14th June 2014. I had slight bleeding on 11th and 12th july. my scan(tvs) sac:6.5mm, yolk:2.3mm and no fetal pole. is that normal?
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