What We Treat
Telehealth
What We Treat
Telehealth
About Us
- Features & Pricing
- For Organizations
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
Fetal dating: 1st trimester ultrasound has margin of error of 5-7 days for due date. If due date by LMP is 9/22/13 and us due date is 9/27/13, they are in agreement, and typically LMP is used. However if ultrasound due date is different by over 7 days, i.e. 10/8/13, then the ultrasound dating would be used. The ultrasound can be off by up to 2 weeks by second trimester, and 3 weeks by 3rd.
Answered 2/13/2015
5.2k views
Thank
Related Questions
A member asked:
Due date is july 5th, have regular 30 day cycles. All ultrasounds are measuring perfectly with lmp. When was conception?
A doctor has provided 1 answer
A member asked:
How well is conception date accuracy with ultrasound at 12 weeks? My LMP started on nov.28, 2011 lasting five days. I had an ultrasound on jan.17, 2012 counting me at 7 weeks and 1 day, then another ultrasound on feb.21, 2012...Counting me at 12 weeks exa
A doctor has provided 1 answer
A member asked:
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?
A doctor has provided 1 answer
A member asked:
My ultrasounds date back to my (estimated) date of conception rather than the first day of my LMP. Is this normal?
A doctor has provided 1 answer
A member asked:
When using the online calc to get conception date...Are those to the day if you knew your LMP and ultrasound dates match. How off can they be?
A doctor has provided 1 answer
People also searched for:
Hi doctors i had a ultrasound yesterday it said due aug 29 what is more accurate LMP or ultrasound i need my most accurate conception date please help?
What does it mean if ultrasound, doesn't match lmp, in terms of conception date and due date?
If your early dating ultrasound shows that my conception date is 18 days after my lmp, does that mean i ovulate late?
My doctor isnt going off my lmp (March 24) why does my sonogram date back to April 15th. What does this date exactly mean ?
LMP was Feb 18, Due date of Nov 24. 6 week ultrasound and 8 week ultrasound Due date of Nov 19. Putting conception on day 10 of my cycle (Feb 27). 5 day difference in due dates. When did conception occur? Could it have been before my LMP?
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
Get the HealthTap app
Video visit and message your doctor
