Embryo Transfer Success Calculator
Estimate embryo transfer success rates based on embryo grade, development stage, endometrial thickness, and patient factors.
Results
Visualization
How It Works
Embryo transfer success depends on embryo quality, uterine receptivity, and patient age. PGT-tested euploid embryos have the highest and most age-independent success rates.
The Formula
Rate = Base (age) × Day Modifier × Grade Modifier × Lining Modifier
Live Birth = Pregnancy Rate × (1 - Miscarriage Rate)
Variables
- PGT-A — Preimplantation Genetic Testing for Aneuploidy — selects chromosomally normal embryos
- FET — Frozen Embryo Transfer — thawing and transferring a previously frozen embryo
Worked Example
Age 33, Day 5 blastocyst, Good grade, 9mm lining: 42% implantation. With PGT: ~60%. Live birth after accounting for miscarriage: ~51%.
Practical Tips
- Single embryo transfer (SET) is recommended to avoid twin pregnancy risks.
- Endometrial thickness of 8-14mm is optimal for implantation.
- Day 5 blastocysts have higher implantation rates than Day 3 embryos.
- PGT-tested euploid embryos have ~60% implantation regardless of maternal age.
- A mock transfer or ERA test can optimize transfer timing.