Should I Go By LMP or Ultrasound Due Date?
The right due date to use depends on how certain you are about your last menstrual period, how regular your cycles are, and whether you had an early ultrasound. LMP dating works well for people with regular cycles and a known period start date, while first-trimester ultrasound dating is usually more accurate when cycles are irregular or dates are uncertain. Always confirm the final due date with your obstetric provider.