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IVF due date calculator

When is my baby due?

Your due date worked from the transfer date and embryo age, which is more precise than an LMP estimate.

Embryo age at transfer

days

5 for a blastocyst, 3 for a cleavage-stage embryo

Days since transfer

days

0 if the transfer was today

These are example numbers. Replace them with yours, then press Calculate.

Example answer

2.7weeks pregnant

first trimester

Up to 13 weeks. The first scan is usually around 6 to 8 weeks after an IVF transfer, earlier than in a spontaneous pregnancy.

This is a guide, not a diagnosis. Share the result with your doctor.

Your result on the scale

The ranges this calculator uses. Yours is highlighted.

Your numbers

Everything worked out from what you entered.

Gestational age: 2 weeks 5 days
Due date: in 261 day(s)
That is about: 37.3 weeks away
Embryo age at transfer: day 5
Basis: 280 days from the notional last period

What each result means

Your result is highlighted. Your own clinic's advice always comes first.

Your resultfirst trimester

Up to 13 weeks. The first scan is usually around 6 to 8 weeks after an IVF transfer, earlier than in a spontaneous pregnancy.

Your resultsecond trimester

14 to 27 weeks. The anomaly scan normally falls between 18 and 21 weeks.

Your resultthird trimester

28 weeks onward. Monitoring becomes more frequent as you approach term.

Your resultpast 42 weeks

Beyond 42 weeks by this calculation. Check the inputs — and your own clinic dating always takes precedence.

Where this fits in your journey

The usual order, from trying to conceive to pregnancy. Not everyone needs every stage. This calculator belongs to stage 5.

Stage 5 · you are here

Pregnant after IVF

After your transfer and your first blood test.

This calculator: When is my baby due?

Calculators for what comes next

How this is worked out

Date calculationExact arithmetic on the dating convention named below. Scan dating by your clinic takes precedence.

After IVF the conception date is known exactly, so the due date is calculated from the transfer and the age of the embryo — not from a last menstrual period.

About this calculator

?What it tells you

Due date from your transfer date. Your due date worked from the transfer date and embryo age, which is more precise than an LMP estimate.

✓When to use it

After a positive test, once transfer details are confirmed

iWhat you need

Embryo age at transfer (days)
Days since transfer (days)

!What it cannot tell you

Clinic scan dating always overrides a calculated date.

Common questions

Why 14 days added?

Pregnancy is dated from the last menstrual period, about 14 days before ovulation. Because IVF fixes the conception date exactly, 14 days are added to keep the dating on the standard scale used everywhere in maternity care.

Does a day-3 transfer give a different date than a day-5?

Yes, by two days. The embryo age at transfer is part of the calculation, which is why this tool asks for it.

Sources

Due date is 280 days from the notional last menstrual period, which for IVF is taken as 14 days before conception. Gestational age therefore equals 14 days plus the embryo age at transfer plus days elapsed. Scan dating by your clinic overrides any calculation.

In an emergency

If you have any of the warning signs listed here, don't wait for a test result or a calculator. Get help now.

112All emergencies, anywhere in India 108Ambulance

Also call your IVF clinic. Most clinics give an emergency number on your treatment or discharge sheet. Save it in your phone now, before you need it.