Animal Reproduction (AR)
Animal Reproduction (AR)
Thematic Section: 39th Annual Meeting of the Association of Embryo Technology in Europe (AETE)

Biobanks, offspring fitness and the influence of developmental plasticity in conservation biology

William Vincent Holt

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Mitigation of the widely known threats to the world’s biodiversity is difficult, despite the strategies and actions proposed by international agreements such as the United Nations Framework Convention on Climate Change (UNFCCC) and the Convention on Biological Diversity (CBD). Nevertheless, many scientists devote their time and effort to finding and implementing various solutions to the problem. One potential way forward that is gaining popularity involves the establishment of biobank programs aimed at preserving and storing germplasm from threatened species, and then using it to support the future viability and health of threatened populations. This involves developing and using assisted reproductive technologies to achieve their goals. Despite considerable advances in the effectiveness of reproductive technologies, differences between the reproductive behavior and physiology of widely differing taxonomic groups mean that this approach cannot be applied with equal success to many species. Moreover, evidence that epigenetic influences and developmental plasticity, whereby it is now understood that embryonic development, and subsequent health in later life, can be affected by peri-conceptional environmental conditions, is raising the possibility that cryopreservation methods themselves may have to be reviewed and revised when planning the biobanks. Here, I describe the benefits and problems associated with germplasm biobanking across various species, but also offer some realistic assessments of current progress and applications.


biodiversity, extinction, cryopreservation, amphibians, corals, genetic resources


Akhter S, Awan MA, Rakha BA, Arshad J, Ansari MS, Iqbal S. Egg yolk can be partially replaced with carboxylated poly-l-lysine (CPLL) in extender for Nili-ravi buffalo bull sperm. Cryo Letters. 2021;42(6):332-40. PMid:35366299.

Albano PG, Steger J, Bošnjak M, Dunne B, Guifarro Z, Turapova E, Hua Q, Kaufman DS, Rilov G, Zuschin M. Native biodiversity collapse in the eastern Mediterranean. Proc R Soc Lond, Ser B: Biol Sci. 2021; 288:20202469.

Anzalone DA, Palazzese L, Iuso D, Martino G, Loi P. Freeze-dried spermatozoa: an alternative biobanking option for endangered species. Anim Reprod Sci. 2018;190:85-93. PMid:29397252.

Beyer J, Song Y, Tollefsen KE, Berge JA, Tveiten L, Helland A, Øxnevad S, Schøyen M. The ecotoxicology of marine tributyltin (TBT) hotspots: a review. Mar Environ Res. 2022;179:105689. PMid:35777303.

Bielanski A. Biosafety in embryos and semen cryopreservation, storage, management and transport. Adv Exp Med Biol. 2014;753:429-65. PMid:25091919.

Blackburn HD. Biobanking genetic material for agricultural animal species. Annu Rev Anim Biosci. 2018;6(1):69-82. PMid:29220198.

Boe K, Bjoru B, Tangvold Bardsen M, Nordtug Wist A, Wolla S, Sivertsen A. Opportunities and challenges related to sperm cryopreservation in Atlantic salmon gene banks. Conserv Sci Pract. 2021;3(12):e552.

Borges AA, Pereira AF. Potential role of intraspecific and interspecific cloning in the conservation of wild mammals. Zygote. 2019;27(3):111-7. PMid:31182179.

Browne RK, Li H, Robertson H, Uteshev VK, Shishova NV, McGinnity D, Nofs S, Figiel CR, Mansour N, Lloyd RE, Agnew D, Carleton CL, Wu M, Gakhova EN. Reptile and amphibian conservation through gene banking and other reproduction technologies. Russ J Herpetol. 2011;18:165-74.

Chapman T, Miles S, Trivedi C. Capturing, protecting and restoring plant diversity in the UK: RBG Kew and the Millennium Seed Bank. Plant Divers. 2018;41(2):124-31. PMid:31193132.

Clulow J, Trudeau VL, Kouba AJ. 2014. Amphibian declines in the twenty-first century: why we need assisted reproductive technologies. In: Holt WV, Brown JL, Comizzoli P, editors. Reproductive sciences in animal conservation: progress and prospects. New York: Springer. vol. 753, p. 275-316.

Clulow J, Upton R, Trudeau VL, Clulow S. Amphibian assisted reproductive technologies: moving from technology to application. In: Comizzoli P, Brown JL, Holt WV, editors. Reproductive sciences in animal conservation. Cham: Springer; 2019, 2nd ed., vol. 1200, p. 413-463

Comizzoli P, Holt WV. Recent progress in spermatology contributing to the knowledge and conservation of rare and endangered species. Annu Rev Anim Biosci. 2022;10(1):469-90. PMid:34758275.

Comizzoli P. Biobanking and fertility preservation for rare and endangered species. Anim Reprod. 2017;14(1):30-3.

Comizzoli P. Birth of a giant panda cub after artificial insemination with frozen-thawed semen: a powerful reminder about the key role of biopreservation and biobanking for wildlife conservation. Biopreserv Biobank. 2020;18(5):349-50. PMid:32936003.

Daly J, Zuchowicz N, Nuñez Lendo CI, Khosla K, Lager C, Henley EM, Bischof J, Kleinhans FW, Lin C, Peters EC, Hagedorn M. Successful cryopreservation of coral larvae using vitrification and laser warming. Sci Rep. 2018;8(1):15714. PMid:30356142.

Daszak P, Berger L, Cunningham AA, Hyatt AD, Green DE, Speare R. Emerging infectious diseases and amphibian population declines. Emerg Infect Dis. 1999;5(6):735-48. PMid:10603206.

Dicks N, Bordignon V, Mastromonaco GF. Induced pluripotent stem cells in species conservation: advantages, applications, and the road ahead. In: Birbrair A, editor. iPSCs from diverse species. Amsterdam: Academic Press; 2021. Chapter 11, p. 221-245

DiRenzo GV, Campbell Grant EH. Overview of emerging amphibian pathogens and modeling advances for conservation-related decisions. Biol Conserv. 2019;236:474-83.

DiRenzo GV, Zipkin EF, Grant EHC, Royle JA, Longo AV, Zamudio KR, Lips KR. Eco-evolutionary rescue promotes host–pathogen coexistence. Ecol Appl. 2018;28(8):1948-62. PMid:30368999.

Durrant BS, Russ KD, Bolamba D, Harper SA, Czekala NM, Lindburg DG. The correlation of vaginal cytology with morphological, endocrinological and behavioral indicators of estrus in the giant panda, Ailuropoda melanoleuca. Biol Reprod. 1998;58:426.

Fernandez-Gonzalez L, Mueller K, Jewgenow K, Zahmel J. Felid-gamete-rescue within EAZA - efforts and results in biobanking felid oocytes and sperm. J Zoo Aquar Res. 2019;7:15-24.

Grosso-Becerra MV, Mendoza-Quiroz S, Maldonado E, Banaszak AT. Cryopreservation of sperm from the brain coral Diploria labyrinthiformis as a strategy to face the loss of corals in the Caribbean. Coral Reefs. 2021;40(3):937-50.

Hagedorn M, Spindler R, Daly J. Cryopreservation as a tool for reef restoration: 2019. In: Comizzoli P, Brown JL, Holt WV, editors. Reproductive sciences in animal conservation. Cham: Springer; 2019, 2nd ed., vol. 1200, p. 489-505

Hagedorn M, van Oppen MJH, Carter V, Henley M, Abrego D, Puill-Stephan E, Negri A, Heyward A, MacFarlane DR, Spindler R. First frozen repository for the Great Barrier Reef coral created. Cryobiology. 2012;65(2):157-8. PMid:22659104.

Hermes C, Keller K, Nicholas RE, Segelbacher G, Schaefer HM. Projected impacts of climate change on habitat availability for an endangered parakeet. PLoS One. 2018;13(1):e0191773. PMid:29364949.

Herrick JR, Mastromonaco G, Songsasen N, Comizzoli P. Biomaterials repositories: the science and business of biobanking Foreword. Reprod Fertil Dev. 2016;28(8):III-IV.

Herrick JR. Assisted reproductive technologies for endangered species conservation: developing sophisticated protocols with limited access to animals with unique reproductive mechanisms. Biol Reprod. 2019;100(5):1158-70. PMid:30770538.

Holt WV, Bennett PM, Volobouev V, Watwon PF. Genetic resource banks in wildlife conservation. J Zool (Lond). 1996;238(3):531-44.

Holt WV, Comizzoli P. Genome resource banking for wildlife conservation: promises and caveats. Cryo Letters. 2021;42(6):309-20. PMid:35366296.

Howard JG, Lynch C, Santymire RM, Marinari PE, Wildt DE. Recovery of gene diversity using long-term cryopreserved spermatozoa and artificial insemination in the endangered black-footed ferret: black-footed ferret gene restoration. Anim Conserv. 2016;19(2):102-11.

Howell LG, Frankham R, Rodger JC, Witt RR, Clulow S, Upton RMO, Clulow J. Integrating biobanking minimises inbreeding and produces significant cost benefits for a threatened frog captive breeding programme. Conserv Lett. 2021;14(2):e12776.

Huang Y, Li DS, Zhou YM, Zhou Q, Li RG, Wang CD, Huang Z, Hull V, Zhang HM. Factors affecting the outcome of artificial insemination using cryopreserved spermatozoa in the giant panda (Ailuropoda melanoleuca). Zoo Biol. 2012;31(5):561-73. PMid:21932329.

IUCN. The IUCN Red List of Threatened Species (Version 2022-2) [Internet]. 2022 [cited 2023 Feb 19]. Available from:

Jiang J, Wang A, Deng X, Zhou W, Gan Q, Lu Y. How Symbiodiniaceae meets the challenges of life during coral bleaching. Coral Reefs. 2021;40(4):1339-53.

Johnston S. Challenges associated with the development and transfer of assisted breeding technology in marsupials and monotremes: lessons from the koala, wombat and short-beaked echidna. Reprod Fertil Dev. 2019;31(7):1305-14. PMid:30991015.

Johnston SD, Holt WV. Using the koala (Phascolarctos cinereus) as a case study to illustrate the development of artificial breeding technology in marsupials: an update. Adv Exp Med Biol. 2019;1200:327-62. PMid:31471803.

Jonsson B, Jonsson N, Hansen MM. Knock-on effects of environmental influences during embryonic development of ectothermic vertebrates. Q Rev Biol. 2022;97(2):95-139.

Kanda R. 2019. Reproductive impact of environmental chemicals on animals. In: Comizzoli P, Brown JL, Holt WV, editors. Reproductive sciences in animal conservation. Cham: Springer; 2019, 2nd ed., vol. 1200, p. 41-70.

Kaneko T, Serikawa T. Long-term preservation of freeze-dried mouse spermatozoa. Cryobiology. 2012;64(3):211-4. PMid:22326411.

Kouba AJ, delBarco-Trillo J, Vance CK, Milam C, Carr M. A comparison of human chorionic gonadotropin and luteinizing hormone releasing hormone on the induction of spermiation and amplexus in the American toad (Anaxyrus americanus). Reprod Biol Endocrinol. 2012;10(1):59. PMid:22905699.

Kouba AJ, Lloyd RE, Houck ML, Silla AJ, Calatayud N, Trudeau VL, Clulow J, Molinia F, Langhorne C, Vance C, Arregui L, Germano J, Lermen D, Della Togna G. Emerging trends for biobanking amphibian genetic resources: the hope, reality and challenges for the next decade. Biol Conserv. 2013;164:10-21.

Kucuk N, Raza S, Matsumura K, Ucan U, Serin I, Ceylan A, Aksoy M. Effect of different carboxylated poly L-lysine and dimethyl sulfoxide combinations on post thaw rabbit sperm functionality and fertility. Cryobiology. 2021;102:127-32. PMid:34242651.

Lampert SS, Burger IJ, Julien AR, Gillis AB, Kouba AJ, Barber D, Kouba CK. Sperm cryopreservation as a tool for amphibian conservation: production of F2 generation offspring from cryo-produced F1 progeny. Animals (Basel). 2022;13(1):53. PMid:36611663.

Landel CP. Archiving mouse strains by cryopreservation. Lab Anim (NY). 2005;34(4):50-7. PMid:15806091.

Li D, Wintle NJP, Zhang G, Wang C, Luo B, Martin-Wintle MS, Owen MA, Swaisgood RR. Analyzing the past to understand the future: natural mating yields better reproductive rates than artificial insemination in the giant panda. Biol Conserv. 2017;216:10-7.

Li YH, Cai KJ, Su L, Guan M, He XC, Wang H, Kovacs A, Ji WZ. Cryopreservation of cynomolgus monkey (Macaca fascicularis) spermatozoa in a chemically defined extender. Asian J Androl. 2005;7(2):139-44. PMid:15897969.

Liu U, Breman E, Cossu TA, Kenney S. The conservation value of germplasm stored at the Millennium Seed Bank, Royal Botanic Gardens, Kew, UK. Biodivers Conserv. 2018;27(6):1347-86.

MacNeil MA, Graham NAJ, Cinner JE, Dulvy NK, Loring PA, Jennings S, Polunin NVC, Fisk AT, McClanahan TR. Transitional states in marine fisheries: adapting to predicted global change. Philos Trans R Soc Lond. Ser B: Biol Sci. 2010;365(1558):3753-63. PMid:20980322.

Mani S, Ghosh J, Coutifaris C, Sapienza C, Mainigi M. Epigenetic changes and assisted reproductive technologies. Epigenetics. 2020;15(1-2):12-25. PMid:31328632.

Marlatt VL, Bayen S, Castaneda-Cortès D, Delbès G, Grigorova P, Langlois VS, Martyniuk CJ, Metcalfe CD, Parent L, Rwigemera A, Thomson P, Van Der Kraak G. Impacts of endocrine disrupting chemicals on reproduction in wildlife and humans. Environ Res. 2022;208:112584. PMid:34951986.

Martin-Wintle MS, Kersey DC, Wintle NJP, Aitken-Palmer C, Owen MA, Swaisgood RR. Comprehensive breeding techniques for the giant panda. In: Comizzoli P, Brown JL, Holt WV, editors. Reproductive sciences in animal conservation. Cham: Springer; 2019, 2nd ed., vol. 1200, p. 275-308.

Mastromonaco GF, Gonzalez-Grajales LA, Filice M, Comizzoli P. 2014. Somatic cells, stem cells, and induced pluripotent stem cells: how do they now contribute to conservation? In: Holt WV, Brown JL, Comizzoli P, editors. Reproductive sciences in animal conservation: progress and prospects. Berlin: Springer-Verlag Berlin. vol. 753, p. 385-427.

Mayer I. The role of reproductive sciences in the preservation and breeding of commercial and threatened teleost fishes. In: Comizzoli P, Brown JL, Holt WV, eds. Reproductive sciences in animal conservation. Cham: Springer; 2019, 2nd ed., vol. 1200, p. 187-224. .

Miranda R, Miqueleiz I, Darwall W, Sayer C, Dulvy NK, Carpenter KE, Polidoro B, Dewhurst-Richman N, Pollock C, Hilton-Taylor C, Freeman R, Collen B, Böhm M. Monitoring extinction risk and threats of the world’s fishes based on the Sampled Red List Index. Rev Fish Biol Fish. 2022;32(3):975-91.

Morita T, Kumakura N, Morishima K, Mitsuboshi T, Ishida M, Hara T, Kudo S, Miwa M, Ihara S, Higuchi K, Takeuchi Y, Yoshizaki G. Production of donor-derived offspring by allogeneic transplantation of spermatogonia in the yellowtail (Seriola quinqueradiata). Biol Reprod. 2012;86(6):176. PMid:22460666.

Morris DW, Dupuch A. Habitat change and the scale of habitat selection: shifting gradients used by coexisting Arctic rodents. Oikos. 2012;121(6):975-84.

Niemann H. Epigenetic reprogramming in mammalian species after SCNT-based cloning. Theriogenology. 2016;86(1):80-90. PMid:27160443.

Nusbaumer D, da Cunha LM, Wedekind C. Sperm cryopreservation reduces offspring growth. Proc R Soc Lond, B. 2019;286(1911):20191644. PMid:31551057.

OIE Terrestrial Animal Health Code [Internet]. 2018 [cited 2023 Aug 4]. Available from:

Oldroyd BP, Yagound B. The role of epigenetics, particularly DNA methylation, in the evolution of caste in insect societies. Philos Trans R Soc Lond. Ser B: Biol Sci. 2021;376(1826):20200115. PMid:33866805.

Paoli D, Pelloni M, Lenzi A, Lombardo F. Cryopreservation of sperm: effects on chromatin and strategies to prevent them. In: Baldi E, Muratori M, editors. Genetic damage in human spermatozoa, Cham: Springer; 2019. 2nd ed., vol. 1166, p. 149-167.

Pearl E, Morrow S, Noble A, Lerebours A, Horb M, Guille M. An optimized method for cryogenic storage of Xenopus sperm to maximise the effectiveness of research using genetically altered frogs. Theriogenology. 2017;92:149-55. PMid:28237331.

Pessôa LVD, Bressan FF, Freude KK. Induced pluripotent stem cells throughout the animal kingdom: availability and applications. World J Stem Cells. 2019;11(8):491-505. PMid:31523369.

Pollock K, Gosalvez J, Lopez-Fernandez C, Johnston SD. Amphibian sperm chromatin structure and function and its relevance to sperm preservation. J Herpetol. 2018;52(4):486-91.

Poo S, Bogisich A, Mack M, Lynn BK, Devan-Song A. Post-release comparisons of amphibian growth reveal challenges with sperm cryopreservation as a conservation tool. Conserv Sci Pract. 2022;4(1):e572.

Prieto MT, Sanchez-Calabuig MJ, Hildebrandt TB, Santiago-Moreno J, Saragusty J. Sperm cryopreservation in wild animals. Eur J Wildl Res. 2014;60(6):851-64.

Rae J, Murray D. Pathogen vs. predator: ranavirus exposure dampens tadpole responses to perceived predation risk. Oecologia. 2019;191(2):325-34. PMid:31535255.

Reyes Palomares A, Rodriguez-Wallberg KA. Update on the epigenomic implication of embryo cryopreservation methods applied in assisted reproductive technologies with potential long-term health effects. Front Cell Dev Biol. 2022;10:881550. PMid:35573677.

Rivers N, Daly J, Temple-Smith P. New directions in assisted breeding techniques for fish conservation. Reprod Fertil Dev. 2020;32(9):807-21. PMid:32527372.

Rodger JC. Marsupials: progress and prospects. In: Comizzoli P, Brown JL, Holt WV, editors. Reproductive sciences in animal conservation. Cham: Springer; 2019, 2nd ed., vol. 1200, p. 309-325.

Rollins-Smith LA. Global amphibian declines, disease, and the ongoing battle between batrachochytrium fungi and the immune system. Herpetologica. 2020;76(2):178-88.

Sanderson H, Johnson DJ, Reitsma T, Brain RA, Wilson CJ, Solomon KR. Ranking and prioritization of environmental risks of pharmaceuticals in surface waters. Regul Toxicol Pharmacol. 2004;39(2):158-83. PMid:15041147.

Santymire R. Implementing the use of a biobank in the endangered black-footed ferret (Mustela nigripes). Reprod Fertil Dev. 2016;28(8):1097-104. PMid:26953795.

Santymire RM, Livieri TM, Branvold-Faber H, Marinari PE. The black-footed ferret: on the brink of recovery? In: Holt WV, Brown JL, Comizzoli P, editors. Reproductive sciences in animal conservation. Cham: Springer; 2014, 2nd ed., vol. 1200, p. 119-134

Scheele BC, Foster CN, Hunter DA, Lindenmayer DB, Schmidt BR, Heard GW. Living with the enemy: facilitating amphibian coexistence with disease. Biol Conserv. 2019;236:52-9.

Schroeder M, Badini G, Sferruzzi-Perri AN, Albrecht C. The consequences of assisted reproduction technologies on the offspring health throughout life: a placental contribution. Front Cell Dev Biol. 2022;10:906240. PMid:35747691.

Schwartz MW, Martin TG. Translocation of imperiled species under changing climates. Ann N Y Acad Sci. 2013;1286(1):15-28. PMid:23574620.

Sicchieri F, Silva AB, Santana VP, Vasconcelos MAC, Ferriani RA, Vireque AA, Reis RM. Phosphatidylcholine and L-acetyl-carnitine-based freezing medium can replace egg yolk and preserves human sperm function. Transl Androl Urol. 2021;10(1):397-407. PMid:33532327.

Sigafus BH, Schwalbe C, Hossack B, Muths E. Prevalence of the amphibian chytrid fungus (Batrachochytrium dendrobatidis) at Buenos Aires national wildlife refuge, Arizona, USA. Herpetol Rev. 2014;45:41-2.

Silla AJ, Byrne PG. The role of reproductive technologies in amphibian conservation breeding programs. In: Lewin HA, Roberts RM, editors. Annual review of animal biosciences. Palo Alto: Annual Reviews; 2019. vol. 7, p. 499-519

Spindler RE, Yan HA, Howard J, Wang PY, Zhang HM, Zhang GQ, Wildt DE. Giant panda (Ailuropoda melanoleuca) spermatozoon decondensation in vitro is not compromised by cryopreservation. Reprod Fertil Dev. 2006;18(7):767-75. PMid:17032585.

Stanton MM, Tzatzalos E, Donne M, Kolundzic N, Helgason I, Ilic D. Prospects for the use of induced pluripotent stem cells in animal conservation and environmental protection. Stem Cells Transl Med. 2019;8(1):7-13. PMid:30251393.

Stuart SN, Chanson JS, Cox NA, Young BE, Rodrigues AS, Fischman DL, Waller RW. Status and trends of amphibian declines and extinctions worldwide. Science. 2004;306(5702):1783-6. PMid:15486254.

Sukparangsi W, Thongphakdee A, Karoon S, Ayuthaya NSN, Hengkhunthod I, Prakongkaew R, Bootsri R, Sikaeo W. Establishment of fishing cat cell biobanking for sustainable conservation. Front Vet Sci. 2022;9:989670. PMid:36439340.

Sun YB, Zhang Y, Wang K. Perspectives on studying molecular adaptations of amphibians in the genomic era. Zool Res. 2020;41(4):351-64. PMid:32390371.

Sutton WB, Gray MJ, Hardman RH, Wilkes RP, Kouba AJ, Miller DL. High susceptibility of the endangered dusky gopher frog to ranavirus. Dis Aquat Organ. 2014;112(1):9-16. PMid:25392038.

Temkin AM, Spyropoulos DD. Induced pluripotent stem cell technology and aquatic animal species. Comp Biochem Physiol C Toxicol Pharmacol. 2014;163:3-13. PMid:24548888.

Thomas CD. Translocation of species, climate change, and the end of trying to recreate past ecological communities. Trends Ecol Evol. 2011;26(5):216-21. PMid:21411178.

Thompson RP, Nilsson E, Skinner MK. Environmental epigenetics and epigenetic inheritance in domestic farm animals. Anim Reprod Sci. 2020;220:106316. PMid:32094003.

Tiberti R, Mangiacotti M, Bennati R. The upward elevational shifts of pond breeding amphibians following climate warming. Biol Conserv. 2021;253:108911.

Tiersch TR, Yang H, Hu E. Outlook for development of high-throughput cryopreservation for small-bodied biomedical model fishes. Comp Biochem Physiol C Toxicol Pharmacol. 2011;154(2):76-81. PMid:21440666.

Titley MA, Butchart SHM, Jones VR, Whittingham MJ, Willis SG. Global inequities and political borders challenge nature conservation under climate change. Proc Natl Acad Sci USA. 2021;118(7):e2011204118. PMid:33558229.

Torii Y, Matsumoto N, Sakamoto H, Nagano M, Katagiri S, Yanagawa Y. Monitoring follicular dynamics to determine estrus type and timing of ovulation induction in captive brown bears (Ursus arctos). J Reprod Dev. 2020;66(6):563-70. PMid:33041275.

Tyler CR, Jobling S. Roach, sex, and gender-bending chemicals: the feminization of wild fish in english rivers. Bioscience. 2008;58(11):1051-9.

Upton R, Clulow S, Calatayud NE, Colyvas K, Seeto RGY, Wong LAM, Mahony MJ, Clulow J. Generation of reproductively mature offspring from the endangered green and golden bell frog Litoria aurea using cryopreserved spermatozoa. Reprod Fertil Dev. 2021;33(9):562-72. PMid:33820600.

Uteshev VK, Gakhova EN, Kramarova LI, Shishova NV, Kaurova SA, Browne RK. Cryobanking of amphibian genetic recourses in Russia: past and future. Russ J Herpetol. 2019;26(6):319-24.

Uteshev VK, Shishova NV, Kaurova SA, Browne RK, Gakhova EN. Hormonal induction of spermatozoa from amphibians with Rana temporaria and Bufo bufo as anuran models. Reprod Fertil Dev. 2012;24(4):599-607. PMid:22541548.

Veprintsev BN, Rott NN. Conserving genetic resources of animal species. Nature. 1979;280(5724):633-4. PMid:288986.

Wang X, Qu J, Li J, He H, Liu Z, Huan Y. Epigenetic reprogramming during somatic cell nuclear transfer: recent progress and future directions. Front Genet. 2020;11:205. PMid:32256519.

Wani NA, Vettical BS, Hong SB. First cloned Bactrian camel (Camelus bactrianus) calf produced by interspecies somatic cell nuclear transfer: A step towards preserving the critically endangered wild Bactrian camels. PLoS One. 2017;12(5):e0177800. PMid:28545049.

Watson PF, Holt WV, editors. Cryobanking the genetic resource; wildlife conservation for the future? London: Taylor and Francis; 2001.

Whittingham DG, Lyon MF, Glenister P. Long-term storage of mouse embryos at—196 ºC: the effect of background radiation. Genet Res. 1977;29(2):171-81. PMid:863249.

Wyns C, Geyter C, Calhaz-Jorge C, Kupka MS, Motrenko T, Smeenk J, Bergh C, Tandler-Schneider A, Rugescu IA, Vidakovic S, Goossens V. ART in Europe, 2017: results generated from European registries by ESHRE. Hum Reprod Open. 2021;2021(3):b026. PMid:34377841.

Yang H, Tiersch TR. Current status of sperm cryopreservation in biomedical research fish models: zebrafish, medaka, and Xiphophorus. Comp Biochem Physiol C Toxicol Pharmacol. 2009;149(2):224-32. PMid:18691673.

Young LE, Sinclair KD, Wilmut I. Large offspring syndrome in cattle and sheep. Rev Reprod. 1998;3(3):155-63. PMid:9829550.

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