How do I calculate my IVF due date for frozen embryo transfer (FET)?

For frozen embryo transfer, your due date calculation depends on the embryo’s age at transfer :

• Day 3 embryo transfer: Add 263 days to your transfer date
• Day 5 embryo transfer: Add 261 days to your transfer date

Alternative method: Add 266 days to transfer date, then subtract the embryo’s age (3 or 5 days)