0
How accurately can an ultrasound determine the date of conception?
Wiki User
∙ 8y ago
Ultrasounds measure the size of the fetus to predict a due date and are usually very accurate, within two weeks, so I would safely assume that it would not be off by five weeks. You can ask your doctor, it won't be the first time he or she has answered that question,I promise.
Also it depends on when the U/S is. U/S before 12 weeks of pregnancy are very accurate, plus or minus 2 weeks. After that there are more varibles, babies grow at different rates so they are not as accurate.
Wiki User
∙ 8y ago
Add your answer:
Earn +20 pts
If a woman's periods are not regular and she falls pregnant how accurately can one then determine the conception date from an ultrasound?
For about the first 10-12 weeks all babies grow at about the same rate so term date can be calculated fairly accurately, you then count back 38 weeks for the date of conception. After 12 weeks babies may not all grow at the same rate so it becomes less accurate.
When was conception date if due date by ultrasound is 1 of Sept?
November 24, 2011
When an ultrasound gives me an estimated due date do i count back forty weeks to get an estimated conception date?
No, you count back 38 weeks for the conception date, but don't forget this is just an estimate.
Would excessive drinking the first trimester alter the measurements of ultrasound to determine size and conception date And if so how many days off could it be?
NO ultrasounds measure amniotic fluid and the fetus head, this would not alter you're conception date. If you wanna know you're conception date go to www.webmd.com and they will calculate the time you conceived based on you're due date. It's just an estimate. GOd bless
Is the EDD given to you on your scan date from your LMP or by the date of conception?
EDD is ESTIMATED. If done by scan is 38 weeks from conception. An EDD is based on the LMP (last menstrual period) and not the date of conception. The ultrasound measurements are comparing the baby to the expected size of other babies at the same gestational age. The earlier the ultrasound is done in the pregnancy, the more accurate it will be. Hope this helps! Dr. B.
If due date is July 23 2010 what is conception date?
It depends on whether July 22nd was the due date of the baby too. It would be roughly October 28th, give or take a few days. However, it is difficult to accurately say when a conception date is. Therefore, I suggest talking to your doctor, midwife or obstetrician about it.
Why is the conception date and how many weeks pregnant different?
Since most women do not know when they ovulated the best way for medical practitioners to determine the age of your pregnancy is to use something that most women do know and that is the start of their last period. When you ovulate during a cycle can vary so by going by date of last period puts everyone on a similar timeline. The first ultrasound from 7 to 12 weeks can determine actual age of the baby very accurately and give you a very good estimation of due date.
When did you conceive if due date is June 3?
June 3rd 2010? That would make your conception date roughly September 9th. However, it is difficult to accurately say when a conception date is. Therefore, I suggest talking to your doctor, midwife or obstetrician about it.
If a baby is born on July 22 2006 what would be the conception date?
It depends on when the due date is, rather than when the baby was born. However, if that was also the due date it would make the conception date roughly October 28th 2005, give or take a few days. However, it's difficult to accurately say when a conception date is.
What should be the due date if conception was on June 3 1988?
June 28th 2010? It would make your conception date roughly October 4th, give or take a few days. However, it is difficult to accurately say when a conception date is. Therefore, I suggest talking to your doctor, midwife or obstetrician about it.
Judging by an ultrasound at 8 weeks im due on March 14 which means i concevied on June 21. how accurate is the conception date i was with someone on June 14 and then with someone else the 17-22?
your conception date should be pretty accurate considering u had an ultrasound. you shouldv'e been ovulating around June 21st.
When did you conceive if your due date is June 26 2012?
I will assume you are talking about 2nd June 2011. If so, it makes your conception date roughly September 8th 2010. However, this date could be wrong by a couple of days. It also depends on when you actually ovulated.
