The Effect of Open and Closed Oocyte Vitrification Systems on Embryo Development: A Systematic Review and Network Meta-Analysis.

: Open and closed vitrification systems are commonly employed in oocyte cryopreservation; however, there is limited evidence regarding a comparison of their separate impact on oocyte competence. This study uniquely brings to the literature, data on the effect of open versus closed vitrification systems on laboratory and clinical outcomes, and the effect of cooling and warming rates. : A systematic search of the literature was performed using the databases PubMed/MEDLINE and the Cochrane Central Library, limited to articles published in English up to January 2023.

Cleavage Stage versus Blastocyst Stage Embryo Transfer in Oocyte Donation Cycles.

Background And Objective: During the last few years, a trend has been noted towards embryos being transferred at the blastocyst stage, which has been associated with improved rates regarding implantation and clinical pregnancy in comparison to cleavage stage embryo transfers. There is a limited number of studies investigating this notion in oocyte donation cycles employing cryopreserved embryos. The aim of this study is to evaluate the implantation potential and clinical pregnancy rates between the day 3 cleavage stage and blastocyst stage embryo transfers in oocyte donation cycles employing vitrified embryos.

Laser versus mechanical assisted hatching: a prospective study of clinical outcomes.

Objective: To compare clinical outcomes after laser or mechanical techniques of assisted hatching (AH) in women of advanced age undergoing IVF or intracytoplasmic sperm injection (ICSI).

Design: Prospective randomized study.

Setting: Center for Human Reproduction, Genesis Clinic, Athens, Greece.