Purpose: Few studies explored whether prolonged cryo-storage after vitrification affects embryo competence and perinatal outcomes. This systematic review and meta-analysis aims at highlighting any putative impact of cryo-storage duration on cryo-survival, miscarriage, live birth and major malformations. Methods: A systematic review was performed using MEDLINE (PubMed), ISI Web of Knowledge, Scopus and Embase databases up to June 2021. Data were combined to obtain a pooled OR, and meta-analysis was conducted using a random effects model. Out of 1,389 screened abstracts, 22 papers were assessed for eligibility, and 5 studies were included (N = 18,047 embryos). Prolonged cryo-storage was defined as > 12 months (N = 3389 embryos). Subgroup analysis was performed for untested vitrified cleavage stage embryos (N = 1739 embryos) and for untested and euploid vitrified blastocysts (N = 13,596 and 2712 embryos, respectively). Results: Survival rate, miscarriage, live birth and major malformation rates were all similar in the two groups. Conclusion: These data further support the safety of long-term cryo-storage of human embryos beyond 12 months. This is reassuring for good prognosis patients with surplus embryos, couples seeking a second child from supernumerary embryos and women postponing the transfer for clinical or personal reasons.
The effect of extended cryo-storage following vitrification on embryo competence: a systematic review and meta-analysis / Canosa, S.; Cimadomo, D.; Conforti, A.; Maggiulli, R.; Giancani, A.; Tallarita, A.; Golia, F.; Fabozzi, G.; Vaiarelli, A.; Gennarelli, G.; Revelli, A.; Bongioanni, F.; Alviggi, C.; Ubaldi, F. M.; Rienzi, L.. - In: JOURNAL OF ASSISTED REPRODUCTION AND GENETICS. - ISSN 1058-0468. - (2022). [10.1007/s10815-022-02405-3]
The effect of extended cryo-storage following vitrification on embryo competence: a systematic review and meta-analysis
Conforti A.;Alviggi C.;
2022
Abstract
Purpose: Few studies explored whether prolonged cryo-storage after vitrification affects embryo competence and perinatal outcomes. This systematic review and meta-analysis aims at highlighting any putative impact of cryo-storage duration on cryo-survival, miscarriage, live birth and major malformations. Methods: A systematic review was performed using MEDLINE (PubMed), ISI Web of Knowledge, Scopus and Embase databases up to June 2021. Data were combined to obtain a pooled OR, and meta-analysis was conducted using a random effects model. Out of 1,389 screened abstracts, 22 papers were assessed for eligibility, and 5 studies were included (N = 18,047 embryos). Prolonged cryo-storage was defined as > 12 months (N = 3389 embryos). Subgroup analysis was performed for untested vitrified cleavage stage embryos (N = 1739 embryos) and for untested and euploid vitrified blastocysts (N = 13,596 and 2712 embryos, respectively). Results: Survival rate, miscarriage, live birth and major malformation rates were all similar in the two groups. Conclusion: These data further support the safety of long-term cryo-storage of human embryos beyond 12 months. This is reassuring for good prognosis patients with surplus embryos, couples seeking a second child from supernumerary embryos and women postponing the transfer for clinical or personal reasons.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
