Embryo report decoder.

Paste a Gardner-style grade from your lab report (for example 4AA or D5 4AB). This translates fields into readable language — it does not score success odds.

Report grade entered as 4AA. In Gardner-style notation, 4AA describes expansion 4, ICM A, and trophectoderm A. This is a translation aid, not a ranking of embryo quality or a prediction of live birth.

Gardner-style blastocyst notation decoder with plain-English field translation. Educational only; clinic reports and counseling govern care.

Field-by-field

• Day of development: Day 5
  Common blastocyst assessment day in many labs.
• Expansion grade: 4
  Expanded blastocyst — larger cavity; zona thins as the embryo grows.
• Inner cell mass (ICM): A
  Inner cell mass graded A — many tightly packed cells (often described as “good” appearance).
• Trophectoderm (TE): A
  Trophectoderm graded A — many cells forming a cohesive outer layer (important for implantation).
• Stage: blastocyst
  Blastocyst-stage embryo (usual modern freeze / transfer stage).
• PGT / genetic testing: untested
  No PGT result entered — morphology only.

What this tool will not do

• No personal success percentage is computed from grade alone.
• No red/green “good embryo / bad embryo” diagnosis.
• No fertility score or ranking across patients.

Limitations

• Lab grading systems and letter cutoffs are not fully standardized across clinics.
• Morphology does not equal genetic status; PGT is a separate test on a biopsy sample.
• A single grade does not predict your personal chance of pregnancy or live birth.
• Clinic embryologists and REIs interpret grades in the context of your full cohort and protocol.

Questions for clinic / embryology

• Can you walk me through how your lab defines this grade and how it ranks among my other embryos?
• Was this embryo biopsied, and if so, what PGT platform and reporting categories do you use?
• How do day-6 or day-7 blastocysts perform in your program compared with day-5?
• What transfer order would you recommend given the full embryo cohort, not only this grade?
• Are there lab photos or morphokinetic notes that change how I should read this line on the report?
• How does this embryo rank within my full cohort for transfer order?