Should rescue ICSI be re-evaluated considering the deferred transfer of cryopreserved embryos in in-vitro fertilization cycles? A systematic review and meta-analysis

Table 3 Main results of selected studies including transfer of cryopreserved rescue-ICSI embryos

First Author, year [ID]	embryo cryopreservation, indication	technique of cryopreservation	n° of patients	endometrial preparation	n° ET	n° of frozen embryos transferred	developmental stage	n° embryos implanted	n° clinical pregnancies	n° ongoing pregnancies or deliveries	n° malformations/newborns
Yuzpe AA, 2000 [22]	Supernumerary	Slow freezing	2	P	2	7	cleavage	1	1	1	0/1
Lombardi E, 2003 [26]	Supernumerary	Slow freezing	1	P	1	5	cleavage	1	1	1	0
Sermondade N, 2010 [15]	Supernumerary	Slow freezing	5		5	12	cleavage	2	2	1	0/1
Ming L, 2012 [14]	Supernumerary	Slow freezing	64	N/P	64	165	cleavage	22	19	15	0/12
Moon JH, 2015 [35]	Supernumerary	Vitrification	1	P	1	1	blastocyst	1	1	1	0
Sachdev NM, 2016 [36]	Elective PGT	Vitrification	12	N/P	3	3	blastocyst	3	3	3	0/3
Li M, 2021 [37]	Elective	Vitrification	332	N/P	332	594	cleavage/ blastocyst	141	122	99	1/109

Empty cells missing values; ET embryo transfer; N Natural; P Programmed, PGT pre implantation genetic testing

ISSN: 1477-7827