IVF Due Date Calculator
Enter your embryo transfer details to find your estimated due date.
Private in your browser · Not medical advice
IVF due date calculator
Enter your transfer, retrieval, or IUI date. Free, private in your browser — your due date appears as a card on this page.
Your information is private and not stored. Confirm the date with your clinic.
Your estimated due date is
—
You are approximately — pregnant today.
This date is an estimate based on standard IVF calculation methods. Your doctor may adjust it based on your scans and individual situation.
A BrighterTomorrow
Awaits
Your Input Details
- Embryo Transfer Type
- —
- Embryo Transfer Date
- —
- Number of Embryos
- —
- Estimated Due Date
- —
Add This Date to Your Calendar
Never miss an important milestone.
Add to Google Calendar Add to Outlook“Every step you’ve taken is a step closer to holding your little one.”
On this page
What this calculator actually does
This is one tool with several starting questions (FET, weeks pregnant, IUI, retrieval, beta). It is not six separate products. Dating uses clinic date + 266 days − embryo age. Your result is an educational estimate. Confirm it with the clinic that has your embryology report.
Offsets we use
| Embryo or procedure | Add to the clinic date | Do not confuse with |
|---|---|---|
| Day 3 transfer | 263 days | Retrieval morning, unless that is all you have |
| Day 5 blastocyst, fresh or FET | 261 days | The freeze date or lining-start date |
| Day 6 blastocyst | 260 days | Rounding “back” to Day 5 |
| Day 7 blastocyst | 259 days | Treating every blastocyst as Day 5 |
| Egg retrieval / fertilization | 266 days | A later transfer you already completed |
| IUI or donor insemination | 266 days | Trigger-shot night, unless your clinic dated from that |
What not to enter
- FET freeze date, cryo storage years, or the first estrogen pill
- Last menstrual period for a medicated FET (unless you switched the menu to LMP on purpose)
- Trigger-shot calendar day when you have a documented insemination or transfer
- A beta hCG number in the due-date date field — betas do not change embryo age
- Ultrasound “size in weeks” as if it were transfer day
Day 6 and Day 7 in plain language
Some embryos reach blastocyst stage on Day 6 or Day 7 instead of Day 5. The lab note matters: a “Day 7 blastocyst transferred 10 June” uses +259 days, not the Day 5 offset. Treating every blast as Day 5 shifts the due date forward by one or two days — enough to confuse scan scheduling.
Example: Day 7 transfer on 10 June 2025 → educational due date 25 February 2026. The same calendar transfer labeled Day 5 would incorrectly show 27 February 2026.
FET: transfer date vs freeze date
Frozen embryo transfer dating uses the thaw-and-transfer morning plus embryo age. Common mistakes:
- Entering the cryo freeze date from a storage receipt
- Entering the first estrogen pill or lining-check day
- Adding years in storage to the pregnancy count
Example: embryo frozen as Day 5 in March 2024, thawed and transferred 3 September 2025 → enter 3 September 2025 and Day 5. The due date is 30 May 2026 (+261), regardless of how long it was frozen.
Weeks-pregnant mode
If you already know gestational age from a clinic scan, open weeks pregnant instead of back-calculating from LMP. Period apps often assume natural conception and will disagree with IVF paperwork.
Will ultrasound overwrite this date?
Because conception timing is documented, many teams keep the IVF date if a first-trimester scan is within about five days. Second- and third-trimester measurements are poorer dating tools. A large gap is a conversation with your clinician, not a silent overwrite from this website. Read the IVF due date vs ultrasound guide and the pregnancy guide.
Edited by Dr. Farhan. Associated with Ghazi Hospital. Educational only — not medical advice; confirm care with your own clinic.
More IVF Tools & Resources
Same calculator, a different starting question — then guides for the weeks after transfer.
