FET Due Date Calculator
Turns a frozen embryo transfer date and embryo age into a due date, plus weeks pregnant on any check day. A day-5 FET adds 261 days.
Pregnancy and Fertility
5 tools
Which Pregnancy and Fertility tool do you need?
| Tool | What it answers |
|---|---|
| Baby Size Calculator | A baby's typical size depends on gestational age. |
| FET Due Date Calculator | After a frozen embryo transfer, the due date is the transfer date plus 266 days minus the embryo's age in days. |
| IVF Due Date Calculator | An IVF due date is the transfer date plus 266 days minus the embryo's age. |
| Ovulation Calculator | Ovulation usually happens about 14 days before the next period starts, and the fertile window is the five days before it plus the day itself and the day… |
| Reverse Due Date Calculator | A reverse due date calculator counts backwards from an estimated due date. |
All tools
Ovulation Calculator
Estimate your ovulation day and six-day fertile window from your last period and cycle length, with the next six cycles laid out in a table.
Reverse Due Date Calculator
Enter a due date to work back to the first day of the last period and the likely conception date, with an adjustment for cycles from 21 to 45 days.
Baby Size Calculator
Estimate your baby's weight from 10 to 40 weeks using the Hadlock ultrasound standard, in grams and pounds, with a fruit-size comparison for each week.
IVF Due Date Calculator
Estimate an IVF due date from the embryo transfer date and embryo age. A day-5 transfer adds 261 days, as set out in ACOG guidance on dating pregnancies.