[Initial results of the cryopreservation of human oocytes]

As a part of an IVF project, "superfluous" ova were frozen, then thawed and fertilized under in-vitro conditions. Altogether 133 oocytes of varying quality, from 22 patients, were frozen. To date, 57 ova have been thawed and 47 oocytes have been found. The survival rate after thawing was 34%, the in-vitro fertilization rate 75%. Out of a total of seven embryo transfers performed there was one pregnancy following transfer of a six-cell embryo.