How is edd measured?

Answer 1

Estimated Due Date (EDD) is typically calculated based on the first day of a woman's last menstrual period (LMP) or through ultrasound measurements that assess fetal development. The most common method uses the rule of Naegele, which adds 280 days (or 40 weeks) to the LMP. Ultrasound can provide a more accurate EDD, particularly if the menstrual cycle is irregular or the date of the last period is unknown. Adjustments may also be made based on individual health factors or specific pregnancy conditions.