Fresh versus frozen embryo transfers in assisted reproduction
KM Wong, M van Wely, F Mol… - Cochrane Database …, 2017 - cochranelibrary.com
KM Wong, M van Wely, F Mol, S Repping, S Mastenbroek
Cochrane Database of Systematic Reviews, 2017•cochranelibrary.comBackground In general, in vitro fertilisation (IVF) or intracytoplasmic sperm injection (ICSI)
implies a single fresh and one or more frozen‐thawed embryo transfers. Alternatively,
the'freeze‐all'strategy implies transfer of frozen‐thawed embryos only, with no fresh embryo
transfers. In practice, both strategies can vary technically including differences in freezing
techniques and timing of transfer of cryopreservation, that is vitrification versus slow freezing,
freezing of two pro‐nucleate (2pn) versus cleavage‐stage embryos versus blastocysts, and …
implies a single fresh and one or more frozen‐thawed embryo transfers. Alternatively,
the'freeze‐all'strategy implies transfer of frozen‐thawed embryos only, with no fresh embryo
transfers. In practice, both strategies can vary technically including differences in freezing
techniques and timing of transfer of cryopreservation, that is vitrification versus slow freezing,
freezing of two pro‐nucleate (2pn) versus cleavage‐stage embryos versus blastocysts, and …
Background
In general, in vitro fertilisation (IVF) or intracytoplasmic sperm injection (ICSI) implies a single fresh and one or more frozen‐thawed embryo transfers. Alternatively, the'freeze‐all'strategy implies transfer of frozen‐thawed embryos only, with no fresh embryo transfers. In practice, both strategies can vary technically including differences in freezing techniques and timing of transfer of cryopreservation, that is vitrification versus slow freezing, freezing of two pro‐nucleate (2pn) versus cleavage‐stage embryos versus blastocysts, and transfer of cleavage‐stage embryos versus blastocysts.
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