From: The effects of embryo culture media on the birthweight of singletons via fresh or frozen-thawed embryo transfer: a large-scale retrospective study
Cleavage
Blastocyst
Year (s)
Vitrolife
(ET cases)
SAGE
(FET cases)
FET + ET
(cases)
2009–2010
12
708
49
237
13
2011
138
430
78
135
81
2012
269
198
75
41
140