IVF Due Date Calculator

Using an IVF due date calculator can be satisfying because it gives you a timeline of when you can expect your dream of becoming a parent to be fulfilled. Knowing a tentative due date also helps you prepare for welcoming your little one in your home if you are pregnant. If you want to know about the estimate time of arrival of your newborn conceived through IVF, keep reading.

How to Calculate IVF Due Date?

You can use different methods to use IVF due date calculator depending on whether you used your own eggs and/or sperms, donor’s eggs and/or sperms, or a surrogate mother. Here are a few formulas for IVF pregnancy week calculation for different cases:

• 1. To calculate IVF due date when you used your own eggs, when using fresh donor egg cycle, or fresh donor embryo cycle, add 38 weeks or 266 days to the egg retrieval date.

For example, egg retrieval was done on 2nd March, your tentative due date will be 23rd November.

• 2. To calculate IVF due date when using frozen embryo transfer (FET), add 266 days or 38 weeks to the transfer date and subtract 3 days or the exact age of the embryo.

For example, FET was done on 2nd March with a 4-day old embryo, your tentative due date will be 19th November (23rd November – 4 days).

However, it is important to note that each pregnancy is different, and your actual due date may be different from the one you calculated using the formulas given above or shared by an IVF due date calculator. Nonetheless, having a tentative due date helps you prepare.

Are There Any Other Ways to Calculate IVF Due Date?

Apart from using the formulas mentioned above, you can use digital IVF pregnancy week calculators to get an estimate due date. Such IVF calculators usually require you to enter the date of transfer of your embryo and the age of the embryo in case of FET or the date of your egg retrieval to calculate your tentative due date.

How to Calculate Due Date in Case of Natural Conception Without IVF?

In usual scenarios when you get pregnant naturally, your pregnancy is about 40 weeks or 280 days long. The estimated due date in a natural conception is determined on the basis of the first day of your last period. There is no sure way knowing the actual date of conception as you can’t really know exactly when did your ovulation occur and when you conceived; thus, these due dates may not be as accurate as the due date from an IVF calculator in case of an IVF pregnancy.

Supposedly, the first day of your last period was 10th October, you can calculate your due date by adding 7 days to this day (i.e. 17th October), then count back to 3 months (i.e. 17th July) to get your tentative due date, which will be 17th July in the next year.

Similar to IVF pregnancy week calculators, you can find digital pregnancy due date calculators as well to figure out the tentative due date of your pregnancy.

How Accurate Are IVF Due Dates?

IVF due dates have the highest accuracy as this is the only case of pregnancy which has a known date of conception. Otherwise, pregnancy due date calculations are usually more of guess work.

However, due date calculation cannot be a 100% accurate in any case because there are chances of premature birth or delayed birth. This means that although IVF due date calculators usually provide a more accurate due date than due dates in case of a natural pregnancy, there is no guarantee. Due dates are meant to provide you a window in which you can expect to go into labor.

Conclusion

Now that you have the estimated arrival date of your baby, you can start making necessary arrangements to welcoming them in your home. There are some IVF pregnancy week-by-week calculators available online as well that you can use to calculate your due date without using the formulas mentioned above.

If you have any doubts about the date shared by an IVF pregnancy calculator, you are advised to consult with your fertility specialist to discuss.