Routine ultrasound dating has not been shown to be more accurate than the calendar method.
Backe
B
B
Nakling
J
J
D005260:Female; D005865:Gestational Age; D006801:Humans; D008598:Menstruation; D011247:Pregnancy; D012680:Sensitivity and Specificity; D016216:Ultrasonography, Prenatal / Q000592:standards*