Adams, G. P., A. C. O. Evans and N. C. Rawlings. 1994. Follicular waves and circulating gonadotrophins in 8-month-old prepubertal heifers. J. Reprod. Fertil. 100:27-33.
Armstrong, D. T., P. J. Kotaras and C. R. Earl. 1997. Advances in production of embryos in vitro from juvenile and prepubertal oocytes from the calf and lamb. Reprod. Fertil. Dev. 9:333-339.
Armstrong, D. T., B. J. Irvine, C. R. Earl, D. McLean and R. F. Seamark. 1994. Gonadotropin stimulation regimes for follicular aspiration and in vitro embryo production from calf oocytes. Theriogenology 42:1227-1236.
Armstrong, D. T. 1993. Recent advances in superovulation of cattle. Theriogenology 39:7-24.
Armstrong, D. T., P. Holm, B. J. Irvine, B. A. Petersen, R. B. Stubbings, D. McLean, G. F. Stevens and R. F. Seamark. 1992. Pregnancies and live births from in vitro fertilization of calf oocytes by laparoscopic follicular aspiration. Theriogenology 38:667-678.
Damiani, P., R. A. Fissore, J. B. Cibelli, J. M. Robl and R. T. Duby. 1995. Evaluation of cytoplasmic maturation of calf oocytes. Theriogenology 43:191 abstr.
Duby, R. T., P. Damiani, C. R. Looney, R. A. Fissore and J. M. Robl. 1996. Prepubertal calves as oocyte donors: promises and problem. Theriogenology 45:121-131.
Duby, R. T., P. Damiani, C. R. Looney, C. R. Long, J. J. Balise and J. M. Robl. 1995. Cytological characterization of maturation and fertilization in prepubertal calf oocytes. Theriogenology 43:202 (abstr).
Erickson, B. H. 1966. Development and senescence of the postnatal bovine ovary. J. Anim. Sci. 25:800-805.
Evans, A. C. O., G. P. Adams and N. C. Rawlings. 1994. Endocrine and ovarian follicular changes leading up to first ovulation in prepubertal heifers. J. Reprod. Fertil. 100:187-194.
Fair, T., P. Hyttel and T. Greve. 1995. Bovine oocyte diameter in relation to maturational competence and transcriptional activity. Mol. Reprod. Dev. 42:437-442.
Gandolfi, F., E. Milanesi, P. Pocar, A. M. Luciano, T. A. L. Brevini, F. Acocella, A. Lauria and D. T. Armostrong. 1998. Comparative analysis of calf and cow oocytes during in vitro maturation. Mol Reprod Dev. 49:168-175.
Hashimoto, S., K. Saeki, Y. Nagano, N. Minami, M. Uamada and K. Utsumi. 1998. Effects of cumulus cell density during in vitro maturation on the developmental competence of bovine oocytes. Theriogenology 49:1451-1463.
Ju, J. C., L. Liu, J. E. Parks and Yang X. 1998. Cytoskeletal reorganization of IVM-derived bovine oocytes after in vitro fertilization. Theriogenology 49:286 (abstr).
Kelly, J. C., J. R. Earl and D. T. Armstrong. 1997. Blastocyst production rate from different grades of oocytes collected from 2 to 3 month old calves. Theriogenology 47:291 (abstr).
Khatir, H., P. Lonergan and P. Mermillod. 1998. Kinetics of nuclear maturation and protein profiles of oocytes from prepubertal and adult cattle during in vitro maturation. Theriogenology 50:917-929.
Liu, L., J. C. Ju and X. Yang. 1998. Parthengenetic development and protein pattern of newly matured bovine oocytes after chemical activation. Mol. Reprod. Dev. 49:298-307.
Lohuis, M. M. 1995. Potential benefits of bovine embryomanipulation technologies to genetic improvement programs. Theriogenology 43:51-60.
Looney, C. R., P. Damiani, B. R. Lindsey, C. R. Long, C. L. Gonseth, D. L. Johnson and R. T. Duby. 1995. Use of prepubertal heifers as oocyte donors for IVF: effect of age and gonadotropin treatment. Theriogenology 43:269 abstr.
Majerus, V., R. De Roover, D. Etienne, S. Kaidi, A. Massip, F. Dessy and I. Donnay. 1999. Embryo production by ovum pick up in unstimulated calves before and after puberty. Theriogenology 52:1169-1179.
Martino, A., T. Mogas, M. J. Palomo and M. T. Paramio. 1995. In vitro maturation and fertilization of prepubertal goat oocytes. Theriogenology 43:473-485.
Revel, F., P. Mermillod, N. Peynot, J. P. Renard and Y. Heyman. 1995. Low developmental capacity of in vitro matured and fertilized oocytes from calves compared with that of cows. J. Reprod. Fertil. 103:115-120.
SAS. 1988. SAS Procedure Guide, Release 6.03 ed. SAS Institute Inc., Cary, NC, USA.
Taneja, M., E. J. Peter, P. E. J. Bols, A. Van De Velde, J. C. Ju, D. Schreiber, M. W. Tripp, H. Levine, Y. Echelard, J. Riesen and X. Yang. 2000. Developmental competence of juvenile calf oocytes in vitro and in vivo: Influence of donor animal variation and repeated gonadotropin stimulation. Biol. Reprod. 62:206-213.
Testart, J., G. Kann, J. Saumande and M. Thibier. 1977. Oestradiol-17 $\beta$, progesterone, FSH and LH in prepubertal calves induced to superovulate. J. Reprod. Fert. 51:329-336.
Yang, X., G. A. Presecce, L. Moraghan, S. Jiang and R. H. Foote. 1994. Synergistic effect of ethanol and cycloheximide on activation of freshly matured bovine oocytes. Theriogenology 41:395-403.
Yang, X., C. Kubota, H. Suzuki, M. Taneja, P. E. J. Bols and G. A. Presicce. 1998. Control of oocyte maturation in cowsbiological factors. Theriogenology 49:471-482.