What this card shows
The 1PN rate (IVF) - by oocytes retrieved card shows how many eggs showed a single pronucleus at the Day 1 fertilization check, as a share of every egg collected on the cycle, month by month. It covers conventional IVF only, where eggs and sperm are placed together in a dish.
A pronucleus (PN) is a visible nucleus in the newly fertilized egg. Two of them, 2PN, is the normal result. Just one, 1PN, is an abnormal outcome.
There are two lines:
1PN rate: your monthly rate.
Benchmark: the Vienna Consensus benchmark, below 5%.
This is one of the cards where lower is better.
Reading the card
This card is the whole-cycle view of the same measurement as 1PN rate (IVF) - by embryos inseminated on the same tab. The two share a numerator and differ only in the denominator:
This card counts every egg retrieved on the cycle, including eggs that were stripped, immature, or otherwise never inseminated.
The inseminated version counts only the eggs placed in the IVF dish.
Because the denominator here is larger, this card always reads lower. That is by design, not a discrepancy between the two.
The benchmark is defined against the inseminated denominator, so compare against it using the other card. On this card, treat the Benchmark line as context rather than as a pass mark.
Hover any point to see the exact figure.
Because the rate is normally low, single months can look volatile when cycle volumes are small. Read the trend across several months.
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.
Because this card's denominator is the retrieval count, an accurate egg count on the aspiration matters as much here as the Day 1 gradings do.
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 1PN rate (IVF) - by oocytes retrieved card is on it.