These are estimates based on assumptioms, but the dates are close enough that it is possible you could have conceived 2/21.
This ultrasound examination is usually done vaginally around the eighth week of pregnancy.
The disadvantages are cost, decreased sensitivity for major anomalies compared to the 20 week exam, and marked increase in training requirements for providers.
The role of the early anatomic survey, when free DNA screening for chromosomal anomalies is being utilized, remains to be determined.
For United States readers, the website, aium.org, of the American Institute of Ultrasound in Medicine will be helpful for guidelines.
Alternatively for international readers, the website, isuog.org, of The International Society of Ultrasound in Obstetrics and Gynecology should be searched for similar guidelines.
An early ultrasound can confirm your pregnancy is progressing normally inside the uterus.
This assurance may be very important for women who are experiencing pain or bleeding in the pregnancy and those who have had previous miscarriages or ectopic pregnancies.
In fact, certification of residency programs in many countries requires documentation of adequate exposure to and training in the evaluation of first-trimester ultrasound.
Throw in the margin of error of an early ultrasound & you can possibly expand conception range by a few more days. Given your age and history, your pregnancy would certainly be considered high risk.
As such, you should be closely followed by an obstetrician with frequent sonos to assess fetal well being with consideration for induction or c-section if appropriate. Read more 14 week ultrasound is on the cusp between first and 2nd trimester. Read more Based on your dating ultrasound, your estimated date of conception would have been 2/26. Month=9&day=6&year=2013 which is a conception calculator your estimated conception date was 14 december 2012 (between 12 to 17 december 2012).
We measure the size of the fetus and from this we calculate the expected date of delivery.
Approximately 2% of natural conceptions and 10% of assisted conceptions result in multiple pregnancy.
Ultrasound dating at 5 weeks 0 days should have a 95% confidence range of 4 weeks 4 days to 5 weeks 3 days which is /- 8%. If you conceived later, your ultrasound should measure smaller than the expected dates based on LMP and your due date would be later. Read more You did not get pregnant before your last menstrual period. Remember a pregnancy lasts forty weeks from the last menstrual period. But, as always, life is not perfect and mistakes can happen. If you conceived on 2/26, you are about 15 weeks along.