What this card shows
The Implantation rate (blastocyst stage) card shows what share of blastocyst-stage embryos transferred went on to implant, month by month.
Implantation is measured by gestational sacs on a follow-up pregnancy ultrasound recorded for the same patient in the weeks after the transfer. The card divides total sacs seen by total embryos transferred, so a transfer of two embryos that produced two sacs counts as two implantations out of two.
There are three lines:
Implantation rate: your monthly rate.
Competency: the Vienna Consensus competency level, 35% or above.
Benchmark: the Vienna Consensus benchmark, 60% or above.
This is the outcome measure at the end of the lab chain. Everything on the other tabs feeds into it.
Reading the card
The transfer and the scan are linked by date, not by record. Nothing in the record ties a pregnancy scan to a particular transfer, so the card infers it: each transfer looks at the same patient's pregnancy scans carrying a sac count performed 3 to 13 weeks afterwards. Scans outside that window are not used. Where a patient had more than one transfer close together, that association is an assumption rather than a recorded fact.
Where a patient had several scans in that window, the card takes the highest sac count any one of them recorded. A sac can be too small to see at the early end of the window, so counting only the first scan would miss a pregnancy that a later scan confirmed. Each transfer still contributes its sacs once however many scans it had, so repeat scanning does not inflate the rate.
The Competency and Benchmark lines are flat reference lines from the Vienna Consensus, not measurements from your lab.
Hover any point to see the exact figure.
Three things to keep in mind when reading a low month:
A month with no follow-up scans recorded reads 0%. That is a recording gap, not a clinical result. Check whether pregnancy scans were entered for that month's transfers before drawing any conclusion.
The most recent month is not yet complete. A transfer needs a scan at least 3 weeks later to count, so this month's transfers have mostly not had their scan yet and the latest point will read low until they do. Treat the final point as provisional.
Because the unit is embryos rather than patients, this is not the same thing as a pregnancy rate. A single-embryo transfer that produced twins would read above 100% for that transfer.
Read this next to Implantation rate (cleavage stage) on the same tab. Blastocyst transfers implant at a higher rate, which is why they carry higher reference thresholds, so comparing the two cards directly is not meaningful. Compare each against its own thresholds.
The card lives on the Laboratory performance (Vienna consensus KPIs) dashboard, on the Clinical Outcomes tab, and responds to the filters at the top:
Date: change the time window. It scopes by transfer date, and defaults to the past 6 months plus the current month.
Clinic: focus on one or more locations, if your organization has several.
Treatment type, Age at cycle start and BMI: narrow to a subset of cycles.
Where this data comes from
The transfer and the embryo gradings come from the Culture tab of the patient's Cycle page. The other half of this card, the gestational sac count, comes from the pregnancy ultrasound recorded against the patient.
The sac count on the pregnancy scan is what drives this card. A scan recorded without one, or a pregnancy scan that never gets entered, both read as a failed implantation. Where this card looks unexpectedly low, missing scans are the first thing to rule out.
Opening this card
In wawa, open Insights from the sidebar, then go to Standard Reports → Laboratory Performance → Laboratory performance (Vienna consensus KPIs). Select the Clinical Outcomes tab. The Implantation rate (blastocyst stage) card is on it.