The goal of this observational study is to determine is there an association between the rates of aneuploidy and the different ranges of serum Antimullerian hormone (AMH) levels.

Retrospective, single-centre study of patients undergoing IVF and preimplantation genetic testing with aneuploidy at the blastocyst stage between January 2018 and December 2022.

Inclusion Criteria:

• All started cycles planned to be followed by preimplantation genetic testing for aneuploidies (PGT-A). PGT-A is proposed to the couples for the following reasons: advanced maternal age, recurrent miscarriage, repeated implantation failure or severe male infertility factor; it is also offered to all patients with a good prognosis who desired information regarding the ploidy status of their embryos.

Exclusion Criteria:

• Data from oocyte donation cycles

Patients who underwent a first IVF cycle with PGT-A at the blastocyst stage