Enter your embryo transfer date and embryo age to estimate your IVF pregnancy due date.
If you’re going through in vitro fertilization, one of the most common questions is:
“When is my baby due?”
The IVF Due Date Calculator helps you estimate your basic pregnancy timeline — including your estimated due date, fertilization date, and gestational age.
Whether you’ve had a fresh embryo transfer or a frozen embryo transfer, this tool is designed to give clarity and reassurance along your journey.
All you need to know is your embryo transfer date and whether your embryo was transferred on day 3 or day 5. The calculator instantly does the rest.
This simple IVF calculator due date tool estimates:
Here’s how it works:
The method is based on standard clinical IVF calculation practices and is suitable for all embryo transfer types.
Term | Simple Meaning |
IVF (In Vitro Fertilization) | A fertility treatment where an egg is fertilized by sperm in a lab, and the resulting embryo is transferred into the uterus. |
Embryo Transfer | A medical procedure in which the embryo is placed into the uterus, typically 3 or 5 days after fertilization. |
3-Day Embryo | An embryo that has been growing for 3 days after fertilization. It is less developed than a blastocyst. |
5-Day Embryo / Blastocyst | A more mature embryo that has been developing for 5 days. Often used in frozen embryo transfers for better success rates. |
Frozen Embryo Transfer (FET) | A procedure where a previously frozen embryo is thawed and transferred into the uterus at a later time. |
Gestational Age | The number of weeks and days you’ve been pregnant, counted from 14 days before fertilization. |
Use the In Vitro Fertilization Due Date Calculator above to explore your personal pregnancy timeline. Whether you’re preparing for a transfer, already pregnant, or planning ahead — this tool offers trusted insight into your IVF journey.
An IVF due date is calculated by taking the embryo transfer date, subtracting the embryo’s age (3 or 5 days), then adding 266 days (which is the typical length of a pregnancy). This gives you an estimated delivery date.
Yes. For a Day 3 embryo, the due date is calculated by adding 263 days to the transfer date. For a Day 5 embryo (blastocyst), you add 261 days instead.
No. The calculation method stays the same for fresh or frozen embryo transfers. What matters is the age of the embryo at transfer, not whether it was frozen.
Yes, it’s possible. A 5 day blastocyst can split and result in identical twins, or two embryos can implant if more than one was transferred — increasing the chance of twins.
IVF babies may arrive around their due date, but like natural pregnancies, some arrive early or late. However, IVF pregnancies are often monitored closely, so scheduled deliveries (like C-sections or inductions) are more common.
The formula is: Transfer Date + (266 – Embryo Age in Days)
So, Day 3 embryo = Transfer + 263 days
Day 5 embryo = Transfer + 261 days
In IVF, pregnancy is counted from 14 days before fertilization, not from the day of transfer. This aligns IVF pregnancies with how natural pregnancies are tracked from the last menstrual period (LMP).
Naturally, IVF has no strong gender bias. However, some couples choose gender selection (where allowed), which can slightly skew statistics. Without selection, the ratio of boys to girls is nearly equal.
The most common stage of failure is implantation, when the embryo doesn’t attach to the uterine lining. This can happen even with good-quality embryos and is influenced by many factors.
Often, only one good-quality embryo is needed for a successful pregnancy. However, some patients go through multiple embryos before success, depending on age, health, and embryo quality.
Clinically, you are considered 4 weeks pregnant exactly 2 weeks after embryo transfer. IVF dating adds 2 weeks before fertilization to match natural pregnancy tracking.
Feelings vary. Some people experience symptoms like cramping, sore breasts, or mild fatigue. Others feel nothing. Both are normal — only a pregnancy test can confirm the result.
A 5-day embryo marks day 5 of development. However, for pregnancy tracking, gestational age starts 14 days before fertilization, so the day a 5-day embryo is transferred is considered 2 weeks and 5 days pregnant.
You’ll get an estimated due date, your pregnancy start date, fertilization date, and how many weeks pregnant you are right now.
In frozen cycles, Day-3 vs Day-5 Transfer depends on your embryo quality and clinic strategy. Day-5 transfers are often preferred because the embryo is more developed and easier to time with the uterine lining. But Day-3 embryos can still lead to success, especially in certain cases. Your doctor will guide you to the best option.
You’ll better understand your IVF pregnancy timeline and be more prepared for upcoming milestones like scans, appointments, or planning ahead.
Our job is to listen, to connect the dots between your needs, and to determine how we can best help you have your baby. If you’re asking how much does it cost for a surrogate, we’ll walk you through every step of the process to ensure there are no surprises.
To make an appointment with one of our counselors or physicians, please call (212) 661-7673 or email info@surrogacy4all.com. We look forward to hearing from you.
Surrogacy4All is a unique international surrogacy service targeted at providing state of the art IVF and surrogacy services to Intended Parents irrespective of age, sex or color, at the lowest possible cost in the world.
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