Our IVF due date calculator provides an estimated due date based on your treatment timeline. It can be used following different types of assisted conception, including embryo transfer cycles and treatments involving donor eggs or embryos.
Enter your treatment details and transfer or retrieval date to understand how far along you may be in your pregnancy journey.
Disclaimer: Every pregnancy is different, so dates given are approximate. You must not rely on this calculator as a substitute for medical diagnosis or advice from a healthcare professional.
A pregnancy calculator for IVF is a specialised tool for those who have conceived using in vitro fertilisation. In contrast to natural conception timelines, which are based on the last menstrual cycle, this tool calculates based on the embryo transfer.
This matters because the embryo’s developmental stage directly affects the pregnancy timeline. Whether transferred on day 3 or day 5, the result will differ slightly. That’s why it’s essential to input the correct details in any IVF-based prediction tool.
You can use this calculator shortly after your transfer to get a realistic estimate of when your baby might arrive.
The type of transfer plays an important role in determining when your baby is likely to be born. There are two key considerations:
● 3-day vs 5-day embryos: The age of the embryo at the time of placement impacts how far along the pregnancy is considered.
● Fresh vs frozen embryos: If you’re using frozen embryos, a FET-specific tool in the UK is more appropriate.
Each clinic may follow slightly different procedures, so it’s important to adjust the settings according to your protocol when using a UK-based pregnancy calculator.
Studies have shown that IVF pregnancies often have more predictable timelines. This is because the point of fertilisation and embryo transfer is clearly defined, unlike in spontaneous conception.
For UK patients of our prediction tool, accuracy improves when the right embryo type and transfer timing are selected. This also applies to twin pregnancies, where using a version designed for multiples gives a more refined estimate.
Here’s how to get started:
● Select the transfer details and embryo development day
● Instantly receive a tailored pregnancy timeline
Our free online calculator was built for individuals and couples across the UK
You can also explore more about IVF
Treatment and advanced options available at Plan Your Baby.

If you are planning or preparing for IVF, our specialists can guide you through each stage — from assessment and cycle planning to ongoing pregnancy monitoring.
With IVF, the exact timing of fertilisation and embryo transfer is known. This removes the uncertainty of ovulation timing, making an IVF calculator for the due date more precise than tools based on the last menstrual period alone.
No, a pregnancy due date IVF calculator offers an estimated full-term delivery date. While useful for general planning, it cannot forecast preterm labour or delivery complications.
Yes, a due date calculator IVF twins version provides a more tailored estimate, as twin pregnancies often deliver earlier. It adjusts the timeline accordingly but still relies on the same embryo transfer data.
A FET due date calculator UK is adjusted for frozen embryo transfer cycles, which may follow a different hormonal preparation schedule compared to fresh cycles. This ensures more accurate timing based on your protocol.
Absolutely. An IVF birth calculator can give a reliable estimate that helps schedule early scans, antenatal appointments, and determine a start date for maternity leave.
That would shift the estimated due date by two days. Always double-check embryo age when using a due date calculator by IVF to avoid miscalculation.
While IVF timelines are generally reliable, twin pregnancies carry more variability. Even though the IVF due date calculator UK offers an accurate baseline, twins often arrive earlier due to natural factors outside of IVF control.
Take the first step towards parenthood today. Our expert team is ready to guide you through your fertility journey with personalized care and support.
Available 24/7
No waiting list
Fast response guaranteed
.webp)

Lauren Coleshill
Baby Cora Rose
The biggest thank you to Plan Your Baby for completing our family. They made us feel safe, supported & confident when our trust in the process had been completely destroyed. They also made us feel extremely well cared for & humanised in an industry that can make you feel like a number. I needed a lot of personal support & Marija was always there to give it to me. Dr Sami threw everything at this attempt, knowing it was our last & I am just so grateful that he took no chances with our care. I really felt his human investment in our family, it wasn’t that he wanted the numbers for his clinic, he wanted this baby for us. Thank you again to the PYB team. We are beyond grateful.

Lindsay Grey
Baby Katie
Plan your baby provided us with support and reassurance at a very tricky time. Their early pregnancy monitoring was thorough and Marija was always quick to respond to any questions, worries or concerns. I had been looking for exactly what plan your baby offers, someone to guide you through the unknown of a new pregnancy after recurrent loss from the ease of your local area.

Victoria Christie
Baby Innis
Since the first interaction with Dr Sami and Marija trying to conceive through to their early pregnancy support we wouldn't be staring at our beautiful 8 day old. Having previous miscarriage and struggles, when I finally saw those double lines I was left feeling anxious and terrified . Immediately, I got support throughout my first trimester and I truly do believe the plan in place meant she is here today. Couldn't be more grateful. Thank you Plan my Baby.

Abigail Moorcock
Baby Rowan
I came to Plan Your Baby after a missed miscarriage, knowing I wanted to do everything I could to support my next pregnancy. I initially had advice on fertility testing, which was thankfully not needed as we conceived quickly the second time round.
I had support from PYB in the first 3 months of my pregnancy — regular blood tests and scans and medication to help the pregnancy. Marija and Dr Sami were supportive, knowledgeable and kind throughout the whole period, providing me with much needed emotional support, especially with some early bleeding in the first few weeks.
I wouldn't hesitate to recommend PYB, especially for the flexible, remote support aspect.
My little boy is here now, so thank you from the two of us.

Veronica Einloft
Baby Celine
I’m incredibly grateful for the support I received from Plan Your Baby during the early stages of my pregnancy. Their team was always available—no matter the time—to guide me, recommend trusted labs and professionals, and help me navigate this delicate and uncertain period with peace of mind.
One of the things that made a huge difference for me was the convenience of their at-home services, including blood collection and progesterone injections. It took a great weight off my shoulders during a time when rest and reassurance were so important.
I wholeheartedly recommend their services to anyone going through the early phases of pregnancy, especially after an embryo transfer. Their care and responsiveness made me feel calmer, more secure, and truly supported.
A very special thank you to Dr. Sami and Marija—without your dedication and kindness, my journey would have been much more difficult.

Aisling O’Keeffe
Baby Teddy
We came to Plan Your Baby following a number of years of failed fertility treatments. From the start Marija and Dr Sami made us feel supported, heard and reassured. We felt immediately that PYB could be the people to help us have a baby. Throughout the IVF process they were always available to support us and we felt confident in their care.
Their unique approach to fertility treatment made IVF more accessible, less stressful and less of a burden when also trying to juggle work. Our son was born in May and we simply couldn’t be more grateful to them for getting us here.

Jade German
Baby Vienna
Plan your baby have been amazing with me throughout my time with them and if it wasn’t for them I wouldn’t be 20 weeks in with my rainbow baby. There very attentive and fast with there replies and quick on helping with all your needs.
Deffo recommend plan your baby if you are struggling with getting pregnant and keeping babies there truly amazing and the support is unreal.
.webp)
Jonny Campbell
Baby Molly
Dr. Sami and his team were nothing short of incredible. They gave us clarity, care and hope when we were afraid to believe this pregnancy could work out. They are the reason we have our gorgeous girl, Molly.
Choose suitable option
Speak to our senior nurse or fertility coordinator
15 min online video consultation
Initial guidance on our approach and treatments
Treatment options overview and next steps
Price
£0
Price
£0
Choose suitable option
45 min online video consultation
Review of your medical history and personal fertility goals
Expert guidance on all available treatment options
Personalised treatment plan
Price
£125
45 min online video consultation
Review of your medical history and personal fertility goals
Expert guidance on all available treatment options
Personalised treatment plan
Price
£125
Speak to our senior nurse or fertility coordinator
15 min online video consultation
Initial guidance on our approach and treatments
Treatment options overview and next steps
Price
£0
Price
£0
45 min online video consultation
Review of your medical history and personal fertility goals
Expert guidance on all available treatment options
Personalised treatment plan
Price
£125
45 min online video consultation
Review of your medical history and personal fertility goals
Expert guidance on all available treatment options
Personalised treatment plan
Price
£125