IVF Due Date Calculator: 3-Day and 5-Day Transfer Dates

Use the IVF Due Date Calculator

Enter a 3‑day or 5‑day transfer date (or egg retrieval for fresh cycles) to estimate your due date and key milestones.

Start your IVF due date plan

How to Use IVF Due Date Calculator: 3-Day and 5-Day Transfer Dates

1. Step 1: Pick a mode

   Choose Use transfer date or Use egg retrieval (fresh). For frozen transfer, use the transfer date mode.

2. Step 2: Enter your date

   Select the embryo transfer date or the egg retrieval date using the date picker.

3. Step 3: Select embryo day

   If using transfer mode, choose 3‑day or 5‑day embryo to match your procedure.

4. Step 4: See your due date

   View the estimated due date, current gestational age, and trimester milestones instantly.

5. Step 5: Save or share

   Copy the summary if you want to share dates with your partner or care team.

Key Features

• 3‑day embryo transfer calculation
• 5‑day embryo transfer calculation
• Accurate due date estimation
• Key pregnancy milestones tracking

Understanding Results

IVF due date calculator formula

IVF due dates follow the same clinical framework as any pregnancy: 40 weeks from the last menstrual period (LMP) or 38 weeks from fertilization. Because IVF gives you exact timing, the calculator anchors on a known event and applies a fixed offset:

• 3‑day transfer → due date = transfer date + 263 days
• 5‑day transfer → due date = transfer date + 261 days
• Egg retrieval (fresh) → due date = retrieval date + 266 days

The timeline also derives a clinical LMP by subtracting 14 days from fertilization (or from the reconstructed fertilization date in transfer mode). Milestones such as first trimester end (13w6d), the standard anatomy scan window (~20w), and the start of the third trimester (28w) are then mapped forward.

Reference Ranges & Interpretation

Ultrasound can slightly adjust official dates if measurements suggest a different gestational age. This is common and usually small when IVF timing is known. Early scans are especially useful for confirming location and viability. If your clinic provides an official EDD, follow their date.

Assumptions & Limitations

This tool assumes a single gestation with typical embryo development at transfer. It does not offer medical advice and cannot capture every clinical nuance (multiples, complications, or policy differences). Your care team’s guidance takes priority.

Complete Guide: IVF Due Date Calculator: 3-Day and 5-Day Transfer Dates

Estimate due dates from 3‑day or 5‑day transfers with the IVF due date calculator. See projected milestones and trimester start dates in a simple timeline.

How IVF due date calculation works

An IVF pregnancy has one big advantage over natural conception: you know the exact timing of fertilization or embryo transfer. That makes the IVF due date calculator especially precise. The clinical due date (EDD) equals 38 weeks from fertilization or 40 weeks from the clinical last menstrual period (LMP). Because LMP is defined as 14 days before conception, IVF calculations simply anchor on a known event and add a fixed number of days.

Here’s the rule of thumb used in this tool: if you enter a transfer date, we subtract the embryo’s age (3‑day or 5‑day) to reconstruct the fertilization day, then add 266 days to get the due date. If you enter an egg retrieval date for a fresh transfer, we treat that day as the fertilization event and add 266 days. These rules align with the standard obstetric model for calculating estimated due dates.

Transfer vs. retrieval input modes

You can calculate the EDD using the embryo transfer date or the egg retrieval date. Use the transfer date if you had a frozen embryo transfer (FET) or if the clinic gave you a specific transfer day for a fresh cycle. Select the embryo’s age at transfer—3‑day (cleavage stage)or 5‑day (blastocyst)—and the calculator does the rest. When you don’t have the transfer date handy and you know you had a fresh transfer, using the retrieval date is often easiest.

The numbers behind the scenes are simple:

• 3‑day transfer: due date = transfer date + 263 days.
• 5‑day transfer: due date = transfer date + 261 days.
• Egg retrieval (fresh): due date = retrieval date + 266 days.

These offsets come from the same 40‑week (280‑day) clinical model used for all pregnancies, adjusted for the fact that IVF gives you an exact conception reference point. For example, at a 5‑day transfer, you are already 2 weeks + 5 days gestational by clinical convention on the day of transfer.

Gestational age vs fetal age in IVF

People often mix up gestational age and fetal age. Gestational age (GA) is the standard used in obstetrics and counts from the clinical LMP—two weeks before fertilization. Fetal age measures time from the actual fertilization event. In IVF, fetal age is exact; gestational age equals fetal age + 14 days. Ultrasound reports, clinic notes, and prenatal checklists almost always use gestational age.

Our calculator shows GA today in weeks and days (for example, 8w 3d), plus a timeline of key prenatal milestones such as the typical window for NIPT around 10 weeks, the second‑trimester anatomy scan near 20 weeks, and the start of the third trimester at 28 weeks. We also display early term (37w) and full term (39w) to help with birth planning discussions.

Key milestones and what to expect

While every pregnancy is unique, a few dates are helpful for planning. With IVF you can map these with confidence because the timeline is anchored to a known start.

• ≈6 weeks GA: a heartbeat is often visible on ultrasound.
• ≈10 weeks: many clinics offer NIPT screening within this window.
• ≈12–13 weeks: first‑trimester screening (varies by clinic and country).
• ≈18–22 weeks: detailed anatomy scan, commonly scheduled around 20 weeks.
• 24 weeks: point of viability in many regions (policy and outcomes vary).
• 28 weeks: third trimester begins.
• 37–38 weeks: early term window; some planned deliveries occur here for medical reasons.
• 39–40 weeks: full term; many spontaneous labors occur in this range.

Clinic guidance and local policies differ, especially around viability and screening windows. Your team will tailor recommendations to your medical history and the specifics of your IVF cycle.

Fresh vs frozen embryo transfers

A fresh transfer occurs a few days after retrieval, while a frozen embryo transfer (FET) may happen weeks or months later. For due date purposes, the difference is simple: use the actual transfer date for FET and select the correct embryo day; for fresh cycles, you can use either the transfer date with the embryo day or the retrieval date alone. The calculator produces the same EDD either way because both inputs lead back to the same fertilization anchor.

3‑day vs 5‑day embryos

On transfer day, a 3‑day embryo is considered gestationally 2 weeks + 3 days, while a5‑day embryo is 2 weeks + 5 days. That’s why the tool adds 263 days for 3‑day transfers and 261 days for 5‑day transfers: both simply adjust the fixed 280‑day clinical model to account for embryo age at transfer.

When ultrasound changes the due date

Clinics sometimes adjust the official due date based on early ultrasound measurements. Small differences happen, and an IVF pregnancy is not exempt. Early ultrasounds are very good at confirming location and viability; dating tweaks are usually minor when you have an exact IVF timeline. If your care team sets an official EDD that differs from this tool, follow the date provided by your clinic—they are using the best available information for your specific case.

Common planning questions

How soon can I see results with HCG? Quantitative HCG blood tests can be informative very early, but the numbers vary widely from person to person and single vs multiple pregnancies. If you want to understand trends between draws, our HCG calculator can help you interpret changes over time.

How does implantation timing affect symptoms? Implantation typically occurs a few days after transfer. The exact day isn’t the same for everyone. Use the implantation calculator to explore likely windows based on your transfer timing.

What’s my current gestational age? The app displays it automatically, but if you want to check different dates (for upcoming appointments, travel, or work planning), try our gestational age calculator.

Are IVF and “regular” due dates comparable? Yes—both use the same 40‑week clinical model. If you’d like to compare IVF results with standard methods like LMP or ultrasound measurements, see the pregnancy due date calculator.

How can I follow week‑by‑week progress? Many people like seeing the whole journey mapped out. Our pregnancy week calculator can give you a clear view of where you are and what’s next.

Compare with other tools

If you conceived without IVF—or you’re simply curious how different methods align—compare your EDD using the conception date calculator and the EDD calculator. You should see only small differences, if any, once the same clinical conventions are applied.

Assumptions, limitations, and sources

This calculator follows the standard obstetric convention of 280 days from LMP (40 weeks) or 266 days from fertilization (38 weeks). It assumes a single gestation and typical embryo development timing at transfer. Ultrasound assessments, complications, multiples, or medical indications can change plans and dates. Your care team’s guidance always takes priority.

For clinical background on due date estimation and dating adjustments, see patient‑facing resources from organizations such as the American College of Obstetricians and Gynecologists (ACOG) and March of Dimes: ACOG and March of Dimes. These links are informational and not endorsements.

The ivf due date calculator: 3-day and 5-day transfer dates is designed to be fast, clear, and practical. Enter a date, pick the embryo day when needed, and you’ll instantly see the estimated due date and a milestone timeline that’s easy to reference on any device.

Frequently Asked Questions