U.S. doctors online nowAsk doctors free
A 31-year-old member asked:

my girlfriends conception date is off by 5 days, what's wrong?

1 doctor answer3 doctors weighed in
Dr. Diane Minich
Family Medicine 37 years experience
Range: There is a range of 2-5 days either side of estimated conception date due to cycle length affecting ovulation date and having sex + or - 2-3 days of ovulation.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
$30 per visit with
membership

Similar questions

A 48-year-old member asked:

Why don?T they calculate due date by day of conception?

1 doctor answer1 doctor weighed in
Dr. Gerard Honore
Fertility Medicine 29 years experience
Unsure: Because the majority of women do not know when they conceived; many can give a good report of when their last period was.
A 32-year-old female asked:

If my conception day is may 6th when is my due date?

1 doctor answer2 doctors weighed in
Dr. Robert Kwok
Pediatrics 33 years experience
January 27, 2013: Due date is about 38 weeks after conception date.
LA
A 25-year-old female asked:

Why do some doctors tell me my conception date is may 11 while others say apr 27 if my trans u/s done on 6/11 said i was 6 weeks 3 days? Who is right?

1 doctor answer3 doctors weighed in
Dr. Andrew Silverman
Fertility Medicine 49 years experience
Conception: Usually an early trans vaginal u/s is the most accurate to date a pregnancy. If there is uncertainty i would perform a second one 3 weeks later to confirm.
GA
A member asked:

After i got my ultra sound on 12/20/12 the doctor said I am 7 weeks and 5 days. What is the date that i concieved? Thank you :)

1 doctor answer1 doctor weighed in
Dr. Milroy Samuel
Obstetrics and Gynecology 24 years experience
Lmp: You really should look at your first day of your last period and add 14 days roughly for best guess of conception.
LA
A 25-year-old female asked:

Why do some docs say that the accuracy of conception date determined by trans u/s depend if I have a reg 28 day cycle and some say that it doesnt?

1 doctor answer1 doctor weighed in
Dr. Barbara Coulter-Smith
Obstetrics and Gynecology 32 years experience
Confusing-ask doctor: Conception does not necessarily occur on the same day you have sex, so the most accurate date is a known last period. A woman's cycles can be 21-35 days apart, and ovulation occurs on day 7-9 on shorter cycles, around day 14-16 for the "classic" 28 day cycle or day 18-21 for the longer cycle. Us dating assumes the average cycle, so a 7 week pregnancy would indicate conception about 5 weeks ago.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
$30 per visit with
membership
Last updated Sep 13, 2013

Disclaimer:

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.