Some authors have even suggested that secular increases in PTD rates and concomitant decreases in rates of SGA birth in the United States may largely be a consequence of increased reliance on ultrasound dating in recent decades
Defining a Suboptimally Dated Pregnancy The American College of Obstetricians and Gynecologists considers first-trimester ultrasonography to be the most accurate method to establish or confirm gestational age 6. Thanks for registering! LMP galast menstrual period gestational age; US gaultrasound gestational age. Reliance on ultrasound dating alone led to an artificially low reported rate of SGA birth and an artificially high rate of PTD 14 These guidelines should not be construed as dictating an exclusive course of treatment or procedure.