[The creation of genetic cryobanks and the use of the methods of developmental biology as a means for preserving rare animal species. II. The obtaining and cryopreservation of the embryos of wild mammals].

A review of published data on obtaining, cryoconservation, and subsequent development of the embryos of wild animals. Development of the embryos until birth after freezing-thawing and transplantation of the embryos to recipient females was followed in eight species. Studies are mostly carried out in the zoos and some universities of USA, Canada, and UK. The Red Data Book species and artificially bred species are the main objects. In these studies, diverse methods of developmental biology were used: induced oocyte maturation, artificial fertilization and cultivation of the embryos in vitro, transplantation of the embryos to foster mothers of the same or closely related species, and obtaining of chimeras.