Does the IVF due date calculator support both fresh and frozen transfers?

Yes. DueDateKit includes an IVF due date calculation approach for both fresh transfers and FET scenarios.

What inputs are required to estimate the due date?

Users select the embryo transfer day (Day 3, Day 5, or Day 6) and enter the exact transfer date.

Where do the calculations run, and is my data stored?

Calculations run in the browser, and DueDateKit states it never stores your data.

Is registration required to use the calculator?

No registration is required, and the tool works on all devices.

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DueDateKit - Your Pregnancy Due Date Calculator

DueDateKit offers a versatile and easy-to-use pregnancy calculator for all expecting parents. Whether you conceived naturally or through IVF, our tool provides an accurate due date estimation. Use our standard calculator or the specialized IVF due date calculator for precise results based on your tr

Jul 21, 2025

Maker

Llyon

2 upvotes

Product Overview

DueDateKit provides a pregnancy due date calculator with an IVF-focused option for parents who conceived through fresh embryo transfers or frozen embryo transfer (FET). It estimates the due date from the exact embryo transfer date and the embryo type (Day 3, Day 5, or Day 6), returning an estimated due date along with the current pregnancy stage.

The IVF calculator is designed to follow medically recognized embryo transfer calculation guidance and is built to run in the user’s browser. DueDateKit is available without registration, works across devices, and supports multiple languages for broader accessibility.

Key features

Embryo-type selection for Day 3, Day 5, and Day 6 transfers
Transfer-date entry to calculate from a known, fixed point in time
Instant results that include an estimated due date and current pregnancy stage
Adjusts the timeline based on the selected embryo age for improved precision
Browser-based calculations with complete privacy (no data storage)
Multilingual support in 11 languages and no registration required

How DueDateKit - Your Pregnancy Due Date Calculator works

1
Choose embryo transfer day
Select the embryo type (Day 3, Day 5, or Day 6) that matches the IVF protocol.
2
Enter the transfer date
Input the exact date the embryo was transferred.
3
Review due date and stage
Receive an estimated due date and the current pregnancy stage based on the entered details.

Use cases

A parent using an IVF clinic’s transfer schedule can enter the embryo type and exact transfer date to estimate the due date and see the current pregnancy stage immediately.
After a frozen embryo transfer (FET), a user can switch to the FET due date workflow, input the transfer date, and receive an estimated due date based on the embryo’s day-of-development.
A couple with a known transfer plan (fresh cycle or FET) can calculate multiple timeline checkpoints (e.g., different embryo day types) to understand how the due date estimate changes with embryo age.

Who is it for?

DueDateKit is for expecting parents and patients navigating IVF, including fresh transfers and frozen embryo transfer (FET). It’s especially useful for those who need due date estimates based on embryo transfer day and exact transfer dates.

Frequently asked questions

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