HealthTap Online Primary Care Doctors Accepting New Patients
Book a video visit
HealthTap
Telehealth
A member asked:

27w 4d pregnant, due date given first trimester march5th secound feb24th which is more reliable? and what would conception date be and current months?

A doctor has provided 1 answer

The 8-11 week scan: A prenatal ultrasound that gives a gestational age of 8-11 weeks is the reliable one for dating, which then brings up the question: when during the first trimester was the scan done?

Dr Trattler agreed

Answered 3/23/2014

5.5k views

Thank

Related Questions

A member asked:

Four first trimester ultrasounds done at 7 8 10 12 week all come. Up with same conception date. What's it mean??

A doctor has provided 1 answer

A member asked:

Dated 12 weeks 4 days on 7th Aug (first trimester), no lmp, how accurate is CRL? and is this age from conception?

2 doctors weighed in across 2 answers

A member asked:

When they do scans in first trimester by crl upto 13 weeks are these the most accurate measurements +/- 5 does this mean conception dates accuracy?

A doctor has provided 1 answer

A member asked:

When a doctor says margin of error is 3-5 days in first trimester us are they talking about lmp, due date, or conception date?

A doctor has provided 1 answer

A member asked:

My due date is May 10th 2015, doctor says I concieved August 3rd, I thought first 2 weeks your not considered pregnant yet? When did conception occur?

A doctor has provided 1 answer

Sponsored Content
HealthTap Medical Group does not endorse products or services. Sponsored content revenues support our mission to make health information free and accessible to all.Learn more

People also searched for:

LMP was Feb 18, I have shorter cycles of 25/26 days. 3 first trimester ultrasounds gave me a due date of Nov 19-21 putting conception at Feb 27-29. How accurate are these conception dates? Anyway conception occurred before February 20?
Are conception date calculators good to use if you've had multiple first trimester ultra sounds done and the due dates remain the same?
How is conception date calculated by first trimester ultrasound?
Can a conception date from early ultrasound be off 3 weeks in first trimester.
Can you figure out conception date from 2 first trimester ultrasounds??

Telemedicine

Primary Care
Manage Your Conditions
Women's Health
Children's Health
Men's Health
Senior Health
Wellness, Prevention & Lifestyle
Sexual Health
Mental & Behavioral Health
Travel Medicine
Urgent Care
Ask your question
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 question

More of what we treat

Allergies
Antibiotics
Asthma
High Blood Pressure
Prescriptions
Type 2 Diabetes
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.
HealthTap
HIPAA logo
HIPAASecure
Soc 2 Type 2 logo
SOC 2 Type 2Certified
JCAHO Accredited
JCAHOAccredited
Member App

Download HealthTap

Video visit and message your doctor

Member App QR Code
Play Store Member LinkApp Store Member Link

Questions?

+1 (888) 828-0841support@healthtap.com
LinkedInTwitter
HomeTermsPrivacyCookiesDMCAHealth TopicsDoctors DirectoryDoctor Q&A by Specialty
Copyright 2026 HealthTap, Inc.