Fertility and sterility
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Fertility and sterility · Jun 1993
Significantly enhanced pregnancy rates per cycle through cryopreservation and thaw of pronuclear stage oocytes.
To examine the results of a 5-year trial using cryopreservation to limit multiple pregnancy and optimize overall pregnancy per cycle. ⋯ Cryopreserved pronucleate oocytes that survive freezing, thawing, and progress through syngamy demonstrate a similar potential for implantation and pregnancy when compared with fresh conceptuses, the cumulative effect of which is an enhanced total PR per cycle.