HIGHLIGHTS
SUMMARY
And 31 hpi (Nagy et_al, 1994; van Wissen et_al, 1995; Capmany et_al, 1996; Neuber et_al, 2003). Others reported to cryopreserve zygotes approximately 20 hpi independent of IVF or ICSI (Macas et_al, 1998; Damario et_al, 1999) while 17 hpi was the time selected by a study vitrifying zygotes produced by conventional IVF (Dowling-Lacey et_al, 2011). Cryopreservation of bipronuclear (2PN) stage zygotes has an abiding role in IVF laboratory practice, independent of the evergrowing shift towards extended embryo culture (Al-Hasani et_al, 2007). Indeed, 2PN stage cryopreservation inspires confidence in a plethora of clinical scenarios . . .
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