A pilot study to gather information on clinical pregnancy rates for preparation of the planning of a larger randomized controlled trial comparing two decision support tools: the deep learning tool iDAScore® and the current annotation model, KIDScore™ D5.

Inclusion Criteria:

1. Patients undergoing IVF/ICSI-treatment with controlled ovarian stimulation with gonadotrophins and the intention to treat by transfer of a single day 5 fresh blastocyst on day 5.
2. At least two good quality blastocysts (GQB) on day 5 (3BB or better on the Gardner scale), originating from normally fertilized oocytes (2PN).

Exclusion Criteria:

1. Previous participation in this RCT
2. Concurrent participation in another investigation
3. Intention to perform any form of preimplantation genetic testing
4. Fertility preservation
5. Planned transfer on day 2-4
6. Female age >42 years
7. A reduced likelihood of obtaining two good quality blastocysts on day 5 as evidenced by an AFC <5 (if available, AFC=antral follicle count)