J Obstet Gynaecol Can. This site complies with the HONcode standard for trustworthy health information. Calculate estimated due date EDD and gestational age based on: Natl Vital Stat Rep. Just add days to get your estimated due date. Determine last date of LMP.
For example, for a day-5 embryo, the EDD would be days from the embryo replacement date.
Due Date Calculator
Because you may not know exactly when you ovulated or conceived, a due date calculator will typically calculate your estimated due date based on your last menstrual period LMP. Conceptional age, menstrual age, and ultrasound age: Int J Gynaecol Obstet. Try our Advanced Calculator. This figure is based on how the baby is measuring, not on your LMP, which the due date calculator uses. The calculations that are provided are estimates based on averages. This is not a diagnosis.