Morphometric measurement of blastocyst diameter was taken on the day of trophoectoderm biopsy. PGT-A was done using NGS platform, followed by thawing and transfer of euploid blastocyts. Follow up of the Pregnancy and implantation rates is done and recorded to study the correlation between the diameter and reproductive outcomes of the blastocyst.

Blastocyst morphological grading proposed by Gardner and Schoolcraft including the expansion degree, inner cell mass, and trophoectoderm assessment has proved its importance. Blastocyst expansion degree that can presented in diameter is linked to the blastocyst implantation and overall success.

In order to evaluate the importance of blastocyst diameter in PGT-A cases, measurements will be taken on the day of trophoectoderm biopsy TE (diameter in μm), followed by TE biopsy using flicking technique. Next, PGT-A will be done using NGS platform and results will be confirmed using PGT-ai. Thawing of euploid blastocyst will take place and expansion degree, survival rate will be recorded. Patient will be followed up for the clinical pregnancy and implantation rates.

Inclusion Criteria:

• Female aged 18-45 years old
• Male aged 18-60 years old
• ICSI cases having PGT-A for their blastocysts
• Must have their blastocysts cultured in time lapse incubator

Exclusion Criteria:

• Presence of any of the endometrial factors that affect embryo implantation such as hydrosalpings, adenomyosis or previous uterine infection
• Any contradictions to undergoing in vitro fertilization or gonadotropin stimulation
• Use of donor oocytes or sperm
• Use of gestational carrier

ICSI cases that have planned to do PGT-A for their blastocysts, oocytes were cultured in time lapse incubators from day 0-6. Female aged between 18 and 45 years old can be included. PGT-A was done using next generation sequencing (NGS) platform and their results were confirmed using PGT-ai.