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Table 1 Hypothetical population characteristics and diagnostic accuracy measures

From: Towards a better understanding of preimplantation genetic screening for aneuploidy: insights from a virtual trial for women under the age of 40 when transferring embryos one at a time

Virtual women (cycles) started (N)

1000

Age (y), median (range)

33 (22–39)

Cycles abandoned (n); %

15; 1.5

Oocyte retrievals (n); %

985; 98.5

Insemination by ICSI (n); %

660; 67.0

Insemination by IVF (n); %

325, 33.0

Cycles with embryos suitable for transfer or testing (n); %

870; 87.0

Embryos suitable for transfer or testing (N); median (range)

4476; 5 (1–14)

Diploid (n); %, median (range)

3073; 68.7; 3 (0–11)

Aneuploid (n); %, median (range)

1403; 31.3; 1 (0–11)

Embryos transferred, without testing, to achieve a first live birth event (n)

2204

aPositive predictive value [TP/(TP + FP)]; %

650/683; 95.2

bNegative predictive value [TN/(TN + FN)]; %

615/1521; 40.4

Live birth events (n)/fresh transfers (n); %

244/870; 28.0

Miscarriages (n)/fresh clinical pregnancies (n); %

27/271; 10.0

  1. aTest perspective without acting on the test result, the proportion of embryos transferred with an abnormal (aneuploid) test result with a correct prediction of no live birth event; bthe proportion with a normal (euploid) test result that correctly predict a live birth event