Antenatal Care: Establishing Gestational Age with Ultrasound
Über den Vortrag
Der Vortrag „Antenatal Care: Establishing Gestational Age with Ultrasound“ von Veronica Gillispie, MD, MAS, FACOG ist Bestandteil des Kurses „Year 3 – Obstetrics/Gynecology“.
Quiz zum Vortrag
A 20-year-old woman comes to your office to confirm dates for her pregnancy. She is certain the first day of her last menstrual period was 8 weeks and 5 days ago. On transvaginal ultrasound, the crown-rump length corresponds to an estimated gestational age of 6 weeks and 2 days old. Which method is most accurate for estimating the due date?
- The gestational age calculated by transvaginal ultrasound should be used to calculate the estimated due date.
- The gestational age based on her last menstrual period should be used to calculate the estimated due date.
- An average gestational age should be calculated based on her last menstrual period and the transvaginal ultrasound.
- Neither gestational age should be used. A more accurate dating scan should be done in the second trimester.
- A repeat transvaginal ultrasound must be done later in the first trimester to determine an accurate gestational age.
Which of the following statements about ultrasound accuracy in determining gestational age is FALSE?
- Second-trimester ultrasounds are most accurate for establishing gestational age.
- First-trimester ultrasounds can estimate the gestational age within one week of accuracy.
- Second-trimester ultrasounds can estimate the gestational age within two weeks of accuracy.
- Third-trimester ultrasounds can estimate the gestational age within three weeks of accuracy.
- If a first-trimester ultrasound measures a gestational age within one week of the last menstrual period, the last menstrual period should be used to establish the gestational age.
A 32-year-old woman presents to your office to determine the gestational age of her pregnancy. She states that her last menstrual period was 8 weeks ago. The crown-rump length on ultrasound is consistent with a gestational age of 7 weeks and 5 days. What is the gestational age of the pregnancy?
- 8 weeks 0 days
- 7 weeks 5 days
- 7 weeks 6 days
- Unable to determine given inconsistency of LMP and first-trimester ultrasound
- 8 weeks 5 days
A 34-year-old woman presents to your antenatal clinic to determine the gestational age of her pregnancy. Her last menstrual period was between 6 and 9 weeks ago. What is the most accurate way to establish the gestational age of her pregnancy?
- A first-trimester measurement of the crown-rump length on transvaginal ultrasound.
- A first-trimester measurement of the biparietal diameter on transvaginal ultrasound.
- A second-trimester measurement of the biparietal diameter, abdominal circumference, and femur length on transabdominal ultrasound
- A serum human chorionic gonadotropin level
- A second-trimester crown-rump length on transabdominal ultrasound
What factors can lead to variability in fetal size in the second and third trimesters?
- Fetal, maternal, and functional placental factors
- Maternal and functional placental factors only
- Fetal factors only
- Date of conception only
- Ultrasound technique variability only
Which of the following measurements on second-trimester ultrasound factors into the calculation of the estimated gestational age of a fetus?
- Biparietal diameter
- Chest circumference
- Tibia length
- Placental thickness
- Crown-rump length
Dozent des Vortrages Antenatal Care: Establishing Gestational Age with Ultrasound
Veronica Gillispie, MD, MAS, FACOG
Dr. Veronica Gillispie is the Associate Professor, Senior Site Lead and Section Head of Obstetrics and Gynecology at Ochsner Health Center in Louisiana, USA.
She obtained her Medical Degree from Meharry Medical College in 2004. Currently, she is Director of Quality for Women’s Services for the Ochsner Health System, and Medical Director of the Minimally Invasive Center for the Treatment of Uterine Fibroids.
Due to her achievements, she earned the Association of Professors of Gynecology and Obstetrics (APGO) Excellence in Teaching Award.
Within Lecturio, Dr. Gillispie teaches courses on Obstetrics.
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Great topics, helps with learning and retention! Highly recommended the ON videos!
it is very basic, not in detailed lecture,try to tell topic in detailed manner
