what is more accurate ultrasound due date or lmp?
Predicting delivery date by ultrasound and last menstrual period in early gestation
Objective: To compare last menstrual period and ultrasonography in predicting delivery date.
Methods: We used ultrasound to scan 17,221 nonselected singleton pregnancies at 8-16 completed weeks. The last menstrual period (LMP) was considered certain in 13,541 and uncertain in