What this card shows
The Implantation rate (cleavage stage) card shows what share of embryos transferred went on to implant, month by month. In this report, “cleavage stage” is inferred from embryo gradings: a cycle counts here if none of its embryos were graded beyond Day 3.
Implantation is measured by gestational sacs on a follow-up pregnancy ultrasound. The card divides total sacs seen by total embryos transferred.
There are three lines:
Implantation rate: your monthly rate.
Competency: the Vienna Consensus competency level, 25% or above.
Benchmark: the Vienna Consensus benchmark, 35% or above.
The thresholds here are lower than the blastocyst equivalents because a cleavage-stage embryo has had less time to prove itself in culture.
Reading the card
Each transfer looks at the patient's pregnancy scans between 21 and 90 days afterwards, roughly 3 to 13 weeks. Scans outside that window are not used.
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.
That match is inferred, not a direct link. A pregnancy scan is not recorded against a particular transfer, so the card pairs them up on the patient and the date window alone. Where a patient had more than one transfer close together, a single scan can be counted against each of them, so treat those months as an estimate.
Cleavage-stage transfers are identified from the cycle's embryo gradings: a cycle counts here if none of its embryos were graded beyond Day 3.
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.
Two 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.
Many clinics now do very few cleavage-stage transfers, so this card can be built on small numbers. A handful of transfers in a month makes the line swing hard, which is why the example above sits at 100% in some months and 0% in others. Read the trend rather than any single point, and hover to check the underlying count before acting on a move.
Read this next to Implantation rate (blastocyst stage) on the same tab, comparing each against its own thresholds rather than against the other.
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 embryo gradings matter twice over here: they decide whether a cycle lands on this card or on the blastocyst one. A cycle whose embryos were transferred on Day 3 but which carries any later grading, including one added after the transfer, will be read as a blastocyst transfer.
Because the scan-to-transfer match rests on the date window, the card is only as good as the dates on both records. A pregnancy scan entered late, or entered without a gestational sac count, reads as a failed implantation.
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 (cleavage stage) card is on it.