You Asked: Why Do I Need An IVF or FET Calculator?

Written by Caroline Shannon

December 2, 2022

Hint: Your due date is based on the date of embryo transfer.

So, you've had a successful embryo transfer. Congratulations a thousand times over—we know the road to becoming intended parent can be a long one. Now it's time for the exciting part: calculating your baby's due date!

Here's the thing: Run-of-the-mill due calculators won’t work to estimate your due date when conceiving with IVF or FET. Instead, you'll need to consider a few other factors, including the type of embryo transfer and when the transfer occurred. Keep reading for the most exciting part—the due date for your bundle of joy!

What are the different types of embryo transfers?‍

Before we discuss how an IVF/FET calculator works, let’s first identify the transfers you will encounter when calculating your baby's due date. When you visit the Nodal tools section on our website, you’ll notice the IVF/FET calculator asks you to identify a type of transfer. The options include: 

  • Day 3 Embryo Transfer: Your transfer involves a day 3 embryo or “cleavage” stage embryo. 
  • Day 5 Embryo Transfer: Your transfer involves a day 5 embryo or “blastocyst” stage embryo.
  • IVF with Own Eggs: Exactly what it sounds like! IVF was performed using an IP(s) own retrieved eggs. 
  • IVF with Fresh Donor Egg Cycle: Retrieved donor eggs were fertilized with sperm from the intended father or sperm donor.
  • Fresh Donor Embryo Cycle: IVF is completed using donor eggs that were never frozen. Once the embryo is formed, it is transferred to a surrogate’s uterus.

Have this information handy before you use the calculator—it's the only way to ensure you'll get an accurate due date.

Related: What Can Surrogates Expect At An Embryo Transfer?

How does an IVF/FET calculator work?

Time to find out when your baby will arrive! The reason this calculator is important is that it takes into consideration that your baby was conceived with IVF and FET, meaning the standard way of calculating due dates (i.e., the date of first day of your Last Menstrual Period) will not apply. This is why the second piece of information you will input into our calculator—in addition to the type of transfer—will be the date of transfer.

Once you input those two pieces of information, (drumroll, please) your baby's due date will pop up on the screen. Cue the excitement!

The bottom line.

Calculate your baby's due date right now and take advantage of our other resources, including a fun Baby Size Comparison tool. ‍

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