Get Virtual Care
For Businesses
About Us
A member asked:
If ultrasounds date from conception, then why did the sonographer tell me i was exactly as far along as my lmp says? edds were the same as well.
A doctor has provided 1 answer
A common confusion: By convention we count the number of weeks of pregnancy as being from the date of conception plus 2. Historically this is because the LMP is much more clearly known than the date of conception, which on average occurs 2 weeks after the lmp.
Answered 2/13/2015
4.7k views
Thank
Related Questions
A member asked:
What do dating ultrasounds date? Conception, lmp, or due date?
A doctor has provided 1 answer
A member asked:
When does it mean when a doctor considers the LMP due date and conception if the ultrasound is in a 7-10 day agreement with the lmp? Need an example
A doctor has provided 1 answer
People also searched for:
Due date is july 5th, have regular 30 day cycles. All ultrasounds are measuring perfectly with lmp. When was conception?
What does it mean if ultrasound, doesn't match lmp, in terms of conception date and due date?
What is my dates of conception if LMP is Oct. 13 2014 and first ultrasound at 9 weeks gave me a due date of July 25 2014?
Don't need to pinpoint conception day, but two first trim ultrasound give same due date we have no lmp to go off, how accurate is age of our baby?
I'm due aug 30th according to ultrasound at 12 weeks, 1st ultrasound at 6 weeks said due date aug 29th, my LMP nov 18 need my conception date range :)?
Didn't find what you're looking for?
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your questionMore of what we treat
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.
HIPAASecure
SOC 2 Type 2Certified
JCAHOAccredited
Download HealthTap
Video visit and message your doctor
