The thermal index, the temperature elevation that potentially can induce fetal injury, is increased in which of the following?
a. Pulsed Doppler imaging
b. Longer examination time
c. Locations near fetal bone
A 25-year-old with irregular menstrual periods presents with a suspicion of pregnancy. A transvaginal ultrasound is performed with these results. What gestational age should be assigned to the pregnancy?
What is the standard error for ultrasound estimates of fetal weight after the first trimester?
What fetal conditions might explain the head measurements seen below?
c. Fetal neural-tube defect
Sonographic evaluation of all except which of the following are best achieved in the first trimester?
A 42-year-old woman presents with vaginal spotting. She has not had a period for 2 months and believes she is perimenopausal. A transvaginal ultrasound is performed in her gynecologist’s office. What is the minimum mean sac diameter measurement necessary to diagnose an anembryonic pregnancy with certainty?