Comparison of pregnancy outcomes between 4th day morula and 5th day blastocyst after embryo transfer: a retrospective cohort study

• Auteurs principaux: Yiqun Sun (Auteur), Qi Shen (Auteur), Haitao Xi (Auteur), Liucai Sui (Auteur), Yanghua Fu (Auteur), Junzhao Zhao (Auteur)
• Format: Livre
• Publié: BMC, 2024-07-01T00:00:00Z.
• Sujets: article
• Accès en ligne: Connect to this object online.

Abstract Background This study was designed to evaluate pregnancy outcomes between morulae transferred on day 4 (D4) and blastocysts transferred on day 5 (D5). Methods From September 2017 to September 2020, 1963 fresh transfer cycles underwent early follicular phase extra-long protocol for assisted...