Vitrification and slow freezing of sheep IVF blastocysts were compared in this study.

Then, the PGCs were froze respectively in six kinds of freezing medias under slow speed cryopreservation process and vitrification process.

Using suspension of RBC as a "model solution system", a high voltage DC electric field is introduced into its low-cooling-rate freezing process.

Effect of slow cryopreservation and vitrification on DNA synthesis of rat bone marrow cells;