Failed Embryo Transfers: What Do Your Records Show
When transfers keep failing, your records — lining thickness, beta-hCG, PGT-A results, and uterine imaging — are the map. This guide decodes the usual numbers so you can see whether the issue is the cavity, the embryo, or timing, and walk into the consult with specifics instead of a vague “it didn’t work.” General education, not individual medical advice.
The fields, decoded
| Field on record | What it means | Healthy benchmark |
|---|---|---|
| Beta-hCG | Pregnancy hormone after transfer | Rising = implant; none = no implant |
| Chemical vs clinical pregnancy | hCG detected vs sac on ultrasound | Clinical is the goal |
| Lining thickness | Endometrial depth on trigger day | ≥7–8 mm generally favorable |
| Lining pattern | Triple-line vs homogeneous | Triple-line preferred |
| PGT-A result | Euploid / mosaic / aneuploid | Euploid = chromosomally normal |
| SHG / hysteroscopy | Cavity anatomy | No polyps/fibroids/septum/adhesions |
| Receptivity (ERA, if done) | Personalized window timing | In-phase vs displaced |
A worked example
Three frozen transfers, each a PGT-A–normal blastocyst, lining 7 mm triple-line, cavity normal by SHG, no pregnancy. → Embryos are screened and the cavity is clear. The signal points to endometrial receptivity / unexplained, not embryo or structure. Useful next questions: ERA-style timing, chronic endometritis screen, lifestyle.
Contrast: three transfers of untested embryos, cavity never imaged. → The priority is a cavity check + PGT-A, because two whole domains are still uninvestigated.
Glossary you can keep
- Chemical pregnancy — hCG rises then fails; implantation happened but didn’t sustain.
- Clinical pregnancy — gestational sac seen on ultrasound.
- Euploid — embryo has the normal chromosome count.
- Mosaic — mixture of normal/abnormal cells; management is case-specific.
What the record can and cannot tell you
- Can show: whether implantation occurred, lining adequacy, cavity normality, and embryo chromosome status.
- Cannot show: why a euploid embryo failed to implant, or whether subtle receptivity issues exist without dedicated testing.
Related reading
- The cause framework: What Is Recurrent Implantation Failure?
- What to check next: What to Review Before Your Next Transfer
- Avoid over-testing: RIF and Unexplained: What the Evidence Can—and Cannot—Tell You
- Treatment decisions: Should You Change Your Transfer Protocol After RIF?
Your next step
Bring order to the numbers: the IVF Case Clarity Assessment summarizes your transfer log into a clinic-ready one-pager.
Medical disclaimer
General education only; not individual medical advice. Have your clinic confirm any interpretation.
References
- Coughlan C, et al. Recurrent implantation failure: definition and management. Reprod Biomed Online. 2014;28(1):14–38.
- Alpha Scientists in Reproductive Medicine and ESHRE. The Istanbul consensus workshop on embryo assessment. Hum Reprod. 2011;26(6):1270–1283.
- Simon A, Laufer N. Repeated implantation failure following IVF-ET. Hum Reprod Update. 2012.