Due Date Calculator Due Date Calculator Calculation Method: Select Method Last Period Ultrasound Conception Date IVF Transfer Date Last Menstrual Period (LMP): Ultrasound Date: Length of Pregnancy at the Time (Weeks): Length of Pregnancy at the Time (Days): Conception Date: IVF Transfer Date: Embryo Age (days): Calculate Clear Results Week of Pregnancy Estimated Due Date Current Week Trimester Estimated Due Date Days Left