Reproduction in Domestic Animals

Developmental Capabilities of Prepubertal Lamb Embryos 143Ledda S, Bogliolo L, Leoni G, Naitana S, 2001: Cell couplingand maturation-promoting factor activity in in vitromaturedprepubertal and adult sheep oocytes. Biol Reprod65, 247–252.Leoni GG, Bebbere D, Succu S, Berlinguer F, Mossa F,Galioto M, Bogliolo L, Ledda S, Naitana S, 2006a:Relations between relative mRNA abundance and developmentalcompetence of ovine oocytes. Mol Reprod Dev 74,249–257.Leoni GG, Succu S, Berlinguer F, Rosati I, Bebbere D,Bogliolo L, Ledda S, Naitana S, 2006b: Delay on the in vitrokinetic development of prepubertal ovine embryos. AnimReprod Sci 92, 373–383.Leoni GG, Rosati I, Succu S, Bogliolo L, Bebbere L,Berlinguer F, Ledda S, Naitana S, 2007: A low oxygenatmosphere during IVF accelerates the kinetic of formationof in vitro produced ovine blastocysts. Reprod DomestAnim 42, 299–304.Maxwell WMC, Evans G, Hollinshead FK, Bathgate R, deGraaf SP, Eriksson B, Gillan L, Morton KM, O’Brien JK,2004: Integration of sperm sexing into the ART toolbox.Anim Reprod Sci 82–83, 79–95.McMillan WH, McDonald MF, 1985: Survival of fertilisedova from ewe lambs and adult ewes in the uteri of ewelambs. Anim Reprod Sci 8, 235–240.Moor RM, Crosby IM, 1986: Protein requirements forgerminal vesicle breakdown in ovine oocytes. J EmbryolExp Morph 94, 207–220.Morton KM, Catt SL, Hollinshead FK, Maxwell WMC,Evans G, 2004a: Production of lambs after the transfer offresh and cryopreserved in vitro produced embryos fromprepubertal lamb oocytes and unsorted and sex-sortedfrozen-thawed spermatozoa. Reprod Domest Anim 39,454–461.Morton KM, Maxwell WMC, Evans G, 2004b: The effect ofFSH concentration during IVM and gamete co-incubationlength during IVF on the development of unstimulatedprepubertal ewe oocytes. Reprod Fertil Dev 16, 205.Morton KM, Maxwell WMC, Evans G, 2004c: The effect ofPMSG administration on the growth and development ofthe reproductive tract of prepubertal ram lambs. In:Proceedings of the 15th International Congress on AnimalReproduction Porto Seguro, Brazil, 1, 233.Morton KM, Catt SL, Hollinshead FK, Maxwell WMC,Evans G, 2005a: The effect of gamete co-incubation timeduring in vitro fertilisation with frozen-thawed unsorted andsex-sorted ram spermatozoa on the development of in vitromatured adult and prepubertal ewe oocytes. Theriogenology64, 363–377.Morton KM, Catt SL, Maxwell WMC, Evans G, 2005b:Effects of lamb age, hormone stimulation and response tohormone stimulation on the yield and in vitro developmentalcompetence of prepubertal lamb oocytes. Reprod FertilDev 17, 593–601.Morton KM, Catt SL, Maxwell WMC, Evans G, 2005c: Anefficient method of ovarian stimulation and in vitro embryoproduction from prepubertal lambs. Reprod Fertil Dev 17,701–706.Morton KM, Catt SL, Maxwell WMC, Evans G, 2005d: Invitro and in vivo developmental capabilities and kinetics ofin vitro development of in vitro matured oocytes from adult,unstimulated and hormone stimulated prepubertal ewes.Theriogenology 64, 1320–1332.Nicholas FW, 1996: Genetic improvement through reproductivetechnology. Anim Reprod Sci 42, 205–214.O’Brien JK, Dwarte D, Ryan JP, Maxwell WMC, Evans G,1996: Developmental capacity, energy metabolism andultrastructure of mature oocytes from prepubertal and adultsheep. Reprod Fertil Dev 8, 1029–1037.O’Brien JK, Beck NFG, Maxwell WMC, Evans G, 1997a:Effect of hormone pre-treatment of prepubertal sheep on theproduction and developmental capacity of oocytes in vitroand in vivo. Reprod Fertil Dev 9, 625–631.O’Brien JK, Catt SL, Ireland KA, Maxwell WMC, Evans G,1997b: In vitro and in vivo developmental capacity ofoocytes from prepubertal and adult sheep. Theriogenology47, 1433–1443.Oropeza A, Wrenzycki C, Herrmann D, Hadeler K-G,Niemann H, 2004: Improvement of the developmentalcapacity of oocytes from prepubertal cattle by intraovarianIGF-I application. Biol Reprod 70, 1634–1643.Presicce GA, Jiang S, Simkin M, Yang X, 1995: Oocyte qualityand embryo development in prepubertal calves. Biol Reprod52(Suppl.), 127.Ptak G, Loi P, Dattena M, Tischner M, Cappai P, 1999:Offspring from one-month-old lambs: Studies on the developmentalcapability of prepubertal oocytes. Biol Reprod 61,1568–1574.Ptak G, Tischner M, Bernabo N, Loi P, 2003: Donordependantdevelopmental competence of oocytes fromlambs subjected to repeated hormonal stimulation. BiolReprod 69, 278–285.Ptak G, Matsukawa K, Palmieri C, Salda LD, Scapolo PA,Loi P, 2006: Developmental and functional evidence ofnuclear immaturity in prepubertal oocytes. Hum Reprod 21,2228–2237.Quirke JF, Hanrahan JP, 1977: Comparison of the survival inthe uteri of adult ewes of cleaved ova from adult ewes andewe lambs. J Reprod Fertil 51, 487–489.Tassell R, Chamley AW, Kennedy JP, 1978: Gonadotrophinlevels and ovarian development in the neonatal ewe lamb.Aust J Biol Sci 31, 267–273.Tervit HR, McMillan WH, McGowan LT, Smith JF, HallDR, Donnison MJ, 1997: Effect of juvenile calf age onfollicular dynamics and in vitro embryo production. Theriogenology47, 300.Trounson AO, Willadsen SM, Moor RM, 1977: Reproductivefunction in prepubertal lambs: ovulation, embryo developmentand ovarian steroidogenesis. J Reprod Fertil 49, 69–75.Van Soom A, Ysebaert MT, de Kruif A, 1997: Relationshipbetween timing of development, morula morphology andcell allocation to inner cell mass and trophectoderm in invitro produced bovine embryos. Mol Reprod Dev 47, 47–56.van der Werf J, 2005: Applying new technologies in sheepbreeding programs. Merinotech Best Practice Sheep BreedingForum Kojonup, Western Australia, 17–23.Worthington CA, Kennedy JP, 1979: Ovarian response toexogenous hormones in six-week-old lambs. Aust J Biol Sci32, 91–95.Wrenzycki C, Herrmann D, Lucas-Hahn A, Korsawe K,Lemme E, Niemann H, 2005: Messenger RNA expressionpatterns in bovine embryos derived from in vitro proceduresand their implications for development. Reprod Fertil Dev17, 23–35.Wright RW, Anderson GB, Cupps PT, Drost M, BradforsGE, 1976: In vitro culture of embryos from adult andprepubertal ewes. J Anim Sci 42, 912–917.Yang X, Presicce GA, Du F, Jiang S, 1997: Pregnancies andcalves derived from pre-pubertal calf oocytes. Theriogenology47, 163.Author’s address (for correspondence): Katherine M. Morton, TheCamel Reproduction Centre, P.O. Box 79914, Dubai, United ArabEmirates. E-mail: kmorton@vetsci.usyd.edu.auConflict of interest: The author declares no conflict of interest.Ó 2008 The Author. Journal compilation Ó 2008 Blackwell Verlag