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

Is conception usually two weeks after gestational age from ultrasound?

A doctor has provided 1 answer
Dr. Gerard Honore answered

Specializes in Fertility Medicine

Yes: That's basically correct, it's close to 2 weeks. Ultrasound dating is calculated as if it's from a 'theoretical' last menstrual period, so actual conception would be around 2 weeks after.

Answered 2/11/2014

4.5k views

Thank

Related Questions

A member asked:

When the ultrasound tech give you how many weeks you are is that going by gestation or conception?

3 doctors weighed in across 2 answers

A member asked:

What is the lowest number of days it is possible after ConceptioN, to see a gestational sac with cells attached to the wall,on a sonogram/ultrasound?

A doctor has provided 1 answer

A member asked:

If conception date is known, due to iui, is an ultrasound recommended to determine gestational date? If so, why? Asking b/c I pay out of pocket.

6 doctors weighed in across 3 answers

A member asked:

I've had several ultrasounds all dating me within a few days of each other now at 7w gestation. How accurate is this when dating conception time?

2 doctors weighed in across 2 answers

A member asked:

Preg test on 3/20. LMP 2/7/ ,41 day cycle. last time had intercourse 2/28 ovulated 3/2. how far am I? I know my fetus is 3 1/2 wks, but preg calculator says 6wk? also when is the gestational sac seen on ultrasound based off conception. hcg is 1235

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:

Why does my ultrasound match my (estimated) date of conception rather than my gestational age?
Do ultrasound measure from conception age or gestation age?
Do ultrasounds measure from gestational age or does it measure from the day of conception? I have an extremely irregular period..
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?
When the ultrasounds says you are 5 weeks pregnant.. Is this the gestational age or conception age?

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.