What this card shows
The Failed fertilization rate (IVF) card shows what share of stimulated IVF cycles ended with no fertilized eggs at all, month by month. It covers conventional IVF only, where eggs and sperm are placed together in a dish.
Unlike the other cards on this tab, this one counts cycles, not eggs. A cycle is counted as failed when not one of its eggs reached two or more pronuclei at the Day 1 check, roughly 17 hours after insemination. For the patient, that is a cycle with nothing to transfer or freeze.
There are two lines:
Failed fertilization rate: your monthly rate.
Benchmark: the Vienna Consensus benchmark, below 5%.
This is one of the cards where lower is better, so you want your line sitting below the benchmark.
Reading the card
The denominator is stimulated IVF cycles with at least one Day 1 grading available. Stimulated cycles are identified by having collected more than one egg, since a natural cycle produces a single egg by design.
Cycles with no Day 1 grading available are left out of both the numerator and the denominator, because there is no way to tell whether they fertilized. A cycle with no gradings is not counted as a failure.
The Benchmark line is a flat reference line from the Vienna Consensus, not a measurement from your lab.
Hover any point to see the exact figure.
Because the rate is low and the unit is cycles rather than eggs, a single failed cycle can move a low-volume month noticeably. Read the trend across several months.
This card measures something different from a low IVF normal (2PN) fertilization rate. A drifting 2PN rate suggests something gradual in culture conditions or handling. Total failure in a cycle points instead at gamete quality, sperm function, egg activation, or the sperm concentration used at insemination. Read the two together.
The card lives on the Laboratory performance (Vienna consensus KPIs) dashboard, on the Fertilization Performance tab, and responds to the filters at the top:
Date: change the time window. It scopes by the date of fertilization, 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
Everything here comes from the Culture tab of the patient's Cycle page: the number of eggs collected is entered on the aspiration record, the insemination is recorded as a fertilization event, and the Day 1 observation on each egg carries the pronuclei grading.
Recording the Day 1 check is what puts a cycle into this card at all. A cycle with no gradings cannot be evaluated and drops out of the measurement entirely, so consistent Day 1 recording is what keeps this rate representative.
Opening this card
In wawa, open Insights from the sidebar, then go to Standard Reports → Laboratory Performance → Laboratory performance (Vienna consensus KPIs). Select the Fertilization Performance tab. The Failed fertilization rate (IVF) card is on it.