Current ACOG [] guidelines recommend changing the EDD when a first-trimester ultrasound differs more than 7 days from the LMP date or more than 10 days between 12 and 20 weeks' gestation ...

Another alternative method to calculate the EDD is to subtract three months from the LMP, add seven days to it and change the year to the next one. For example, if your LMP was September 7, 2013 ...

A difference (EDD-diff) between estimated date of delivery based on last menstrual period (EDD-LMP) and ultrasound around 18 weeks' pregnancy (EDD-US) may indicate restricted or accelerated early ...

Monday, December 2, 2024. News & Perspective Drugs & Diseases CME & Education Video Decision Point Drugs & Diseases CME & Education Video Decision Point ...