Basic Obstetric Ultrasound -- Introduction
Women's Health Care Physicians
observed errors. We conclude that these models, de- veloped for dating between 14 and 42 weeks of fetal development, provide highly accurate estimates of fetal age in the second trimester of pregnancy. KEY WORDS: Fetus, Ultrasound, Dating widely used in a number of ultrasound laboratories, have not been adequately. Request (PDF) | A comparative analys | A dataset of 64 pregnancies conceived by artificial reproductive techniques was studied to assess the accuracy of second-trimester dating formulae when these were applied in routine ultrasound clinics in different centers. Dating formulae for biparietal diameter (BPD) and femur. Second trimester ultrasounds are not "dating ultrasounds". During the first trimester babies grow at about the same rate so you can date a pregnancy by CRL measurements. In the second and third trimesters babies grow at different rates so you cannot dat a pregnancy by them. I have never seen an EDD.
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How accurate is second trimester fetal dating?
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Although the dating of pregnancy accuracy takes a dive, still ultrasound is indispensable for the other uses. What To Expect Community. I was an ordinary doctor until I found Medscape. Rapid and accurate determination of gestational age GA may here vital to the appropriate care of the critically ill pregnant patient and improve obstetric care through allowing the optimal timing of necessary interventions and the avoidance of unnecessary ones.
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The present study showed that The information should not be construed as dictating an exclusive course of treatment or procedure to be followed. As soon as data from the last menstrual period LMPthe first accurate ultrasound examination, or both are obtained, the gestational age and the EDD should be determined, discussed with the patient, and documented clearly in the medical record. Ultrasound scans are considered to be the most cost-effective, accurate and safe methods for measurement of various fetal parts in pregnant women.