cryopreservation of genetic material. ovum in ice cube on white

egg ovum cryopreservation ice sperm fertility spermatozoon background ivf genetic cells oocyte material reproduction design isolated white health medical bank laboratory liquid biology storage biotechnology human biochemistry biological nitrogen fertilization preservation infertility freezing insemination spermatozoa vitro sample donor fertilisation artificial ova conserve cryo cryobank cryoconservation cryosample female male object cube