Participants
This retrospective study was carried out from January 2016 to December
2019 at the Center for Reproductive Medicine of Mali Hospital, Haikou,
China and the Hospital of Shenzhen Immigration Inspection, Shenzhen,
China. This study included the first frozen-thawed blastocyst transfer
cycle of woman who underwent IVF cycle with or without ICSI
(Intracytoplasmic Sperm Injection) with an indication of tubal, male, or
unexplained infertility. Women with a diagnosis of a congenital or
acquired uterine abnormality, such as a uterine malformation,
adenomyosis, submucous myoma, uterine fibroids or intrauterine adhesions
were excluded from this study.