This pregnancy due date calculator uses the Naegele's rule standard, which adds 280 days (40 weeks) to the first day of your last menstrual period (LMP). It can also adjust for IVF transfer dates or direct conception dates if known.
Calculation Methods:
✔Last Menstrual Period (LMP): The most common method. Assumes a 28-day cycle, but you can adjust cycle length.
✔Conception Date: If you know exactly when you conceived, we add 266 days.
✔IVF Transfer: Adjusted based on whether you had a Day 3 or Day 5 embryo transfer.