ASSISTED REPRODUCTION

IVF & FET Due Date Calculator

Calculate precise gestational age and your estimated due date following in vitro fertilization (IVF) or frozen embryo transfer (FET) using SART and ASRM standards.

Assisted Reproduction Dating SART / ASRM Certified Method

Estimated Due Date

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Current Gestational Age: —

Equivalent LMP Date

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For medical charts

Procedure Selected

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Embryonic developmental timing

Why IVF Gestational Dating is More Precise

In spontaneous conception, gestational dating relies on menstrual recall, which is subject to cycle variability. In assisted reproductive technology (ART), the precise timing of fertilization and embryo culture is known to the exact day.

Formulas Aligned with SART Guidelines

Day 5 Blastocyst Transfer: Due Date = Transfer Date + 261 days (Equivalent LMP = Transfer - 19 days).
Day 3 Cleavage Embryo: Due Date = Transfer Date + 263 days (Equivalent LMP = Transfer - 17 days).
Day 6 Blastocyst Transfer: Due Date = Transfer Date + 260 days (Equivalent LMP = Transfer - 20 days).
Egg Retrieval / ICSI: Due Date = Retrieval Date + 266 days (Equivalent LMP = Retrieval - 14 days).

References

Society for Assisted Reproductive Technology (SART). Clinic Summary Reports and Embryo Dating Guidelines. Birmingham, AL.
American Society for Reproductive Medicine (ASRM). A practice committee report on assisted reproductive technology. Fertil Steril 2020.