IVF Embryo Grading Interpreter
Enter your blastocyst grade (Gardner stage, ICM, trophectoderm) to see what it suggests about quality.
Embryo Quality
Grading helps rank embryos but cannot guarantee outcome. Discuss your embryos with your clinic.
About embryo grading
Blastocysts (Day 5-6 embryos) are graded by expansion stage plus the inner cell mass (ICM) and trophectoderm (TE), each A/B/C.
Higher grades (e.g. 4AA) generally implant more often, but lower-grade embryos can still become healthy babies.
FertiJourney's lab grades and selects embryos with PGT-A available — get a free IVF assessment.
Embryo grading FAQ
Is a 4AA embryo the best?
Yes — a fully expanded blastocyst with top ICM and trophectoderm has the highest potential.
Can a lower-grade embryo still work?
Yes — lower-grade embryos can still implant and become healthy babies.
Can embryos be frozen?
Yes — good-quality embryos can be frozen for future transfer.