This study focuses on understanding embryos with complex aneuploidy, which means they have three or more abnormal chromosomes. "Chaotic" embryos have six or more abnormal chromosomes. We use a test called preimplantation genetic testing for aneuploidy (PGT-A) to check embryos before pregnancy. The goal is to find if these embryos might still be healthy enough for a transfer and can lead to a live birth. We want to re-test embryos to see if earlier results were wrong. Your decision to join is voluntary and won't affect your healthcare.

• This study involves re-testing embryos, not transferring them.
• Your participation is voluntary and won't affect your healthcare.
• The aim is to improve understanding of embryo health for better future results.