Bloomfield, F. H., Oliver, M. H., Hawkins, P., Campbell, M., Phillips, D. J., Gluckman, P. D., Challis, J. R. and Harding, J. E. 2003. A periconceptional nutritional origin for noninfectious preterm birth. Science 300: 606.
Branford Oltenacu, E. A. and Boylan, W. J. 1981. Productivity of purebred and crossbred Finnsheep. II. Lambs weight and production indices of ewes. Journal of Animal Science 52: 998–1013.
Cochran, K. P., Notter, D. R. and McClaugherty, F. S. 1984. A comparison of Dorset and Finnish Landrace crossbred ewes. Journal of Animal Science 59: 329–337.
Costine, B. A., Inskeep, E. K. and Wilson, M. E. 2005. Growth hormone at breeding modifies conceptus development and postnatal growth in sheep. Journal of Animal Science 83: 810–815.
Davis, G. H. 2005. Major genes affecting ovulation rate in sheep. Genetics, Selection, Evolution 37: (suppl. 1) S11–S24.
Dickinson, A. G., Hancock, J. L., Hovell, G. J. R., Taylor, St C. S. and Wiener, G. 1962. The size of lambs at birth–a study involving egg transfer. Animal Production 4: 64–79.
Doloksaribu, M., Gatenby, R. M., Subandriyo and Bradford, G. E. 2000. Comparison of Sumatra sheep and hair sheep crossbreds. III. Reproductive performance of F2 ewes and weights of lambs. Small Ruminant Research 38: 115–121.
Donald, H. P. and Russell, W. S. 1970. The relationship between live weight of ewe at mating and weight of newborn lamb. Animal Production 12: 273–280.
Eyal, E., Goot, H., Kali, J., Amir, D., Rosenberg, M., Schindler, H., Davidson, M., Tamarin, R., Foote, W. C., Matthews, D. H. and Hogue, D. E. 1984. The promotion of prolific strains of sheep by nutritional and managerial means. Report submitted to the United States-Israel Binational Agricultural Research and Development Fund.
Fahmy, M. H. and Mason, I. L. 1996. Newly developed proli.c breeds. In Prolific sheep (ed. Fahmy, M. H.), pp. 187–203. CAB International, Wallingford.
Freetly, H. C. and Leymaster, K. A. 2004. Relationship between litter birth weight and litter size in six breeds of sheep. Journal of Animal Science 82: 612–618.
Gadd, T. S., Aitken, R. P., Wallace, J. M. and Wathes, D. C. 2000. Effect of a high maternal dietary intake during mid-gestation on components of the utero-placental insulin-like growth factor (IGF) system in adolescent sheep with retarded placental development. Journal of Reproduction and Fertility 118: 407–416.
Gatenby, R. M., Bradford, G. E., Doloksaribu, M., Romjali, E., Pitono, A. D. and Sakul, H. 1997. Comparison of Sumatra sheep and three hair sheep crossbreds. I. Growth, mortality and wool cover of F1 lambs. Small Ruminant Research 25: 1–7.
Gluckman, P. D. and Pinal, C. S. 2003. Regulation of fetal growth by the somatotrophic axis. Journal of Nutrition 133: 1741S–1746S.
Goot, H. 1973. Finnsheep in Finland. Special publication no. 28, The Volcani Center, Bet Dagan, Israel.
Gootwine, E. 2004. Placental hormones and fetal-placental development. Animal Reproduction 82–83: 551–566.
Gootwine, E., Bor, A., Braw-Tal, R. and Zenou, A. 1993. Inheritance of birthweight and growth traits in crosses between the Booroola-Merino and Assaf sheep breeds. Livestock Production Science 33: 119–126.
Gootwine, E., Rozov, A., Bor, A. and Reicher, S. 2003. Effects of the FecB (Booroola) gene on reproductive and productive traits in the Assaf breed. Proceedings of the international workshop on major genes and QTL in sheep and goats, Toulouse, France, com. no. 2–12.
Gordon, I. 1958. The hormonal augmentation of fertility in the ewe during the breeding season. Journal of Agricultural Science, Cambridge 50: 123–151.
Greeff, J. C., Hofmeyr, J. H., Lourens, D. J., Wyma, G. A. and Maijala, K. 1992. Performances of Finnsheep in South Africa. Agricultural Science in Finland 1: 195–202.
Greenwood, P. L., Slepetis, M. R. and Bell, A. 2000. Influences on fetal and placental weights during mid to late gestation in prolific ewes well nourished throughout pregnancy. Reproduction, Fertility, Development 12: 149–156.
Grennan, E. J. 2001. Extending the season for prime lamb production from grass. End of project report: sheep series no. 12, Teagasc, Sheep Research Centre, Athenry, Co. Galway. Irish Agricultural and Food Authority internal publication project no. 4472.
Hall, D. G., Fogarty, N. M. and Gilmour, A. R. 1995. Performance of crossbred progeny of Trangie Fertility Merino and Booroola Merino rams and Polled Dorset ewes. 1. Lamb birth weight, survival and growth. Australian Journal of Experimental Agriculture 35: 1069–1074.
Hinch, G. N., Crosbie, S. F., Kelly, R. W., Owens, J. L. and Davis, G. H. 1985. Influence of birth weight and litter size on lamb survival in high fecundity Booroola-Merino crossbred flocks. New Zealand Journal of Agricultural Research 28: 31–38.
Holliday, R. 1960. Plant population and crop yield. Nature 186: 22–24.
Holst, P. J., Fogarty, N. M. and Stanley, D. F. 2002. Birth weights, meningeal lesions, and survival of diverse genotypes of lambs from Merino and crossbred ewes. Australian Journal of Agricultural Research 53: 175–181.
Iman, N. Y. and Slyter, A. L. 1996. Lifetime lamb and wool production of Targhee or Finn-Dorset Targhee ewes managed as farm or range flock. I. Average annual ewe performance. Journal of Animal Science 74: 1757–1764.
Kaulfuss, K. H., Schramm, D. and Berttram, M. 2000. Effect of genotype, dam age, litter size, birth weight and ram on morphological parameters of the placenta in sheep. Deutsche Tierärzliche Wochenschrift 107: 269–275.
Kleemann, D. O., Walker, S. K., Walkey, J. R. W., Ponzoni, R. W., Smith, D. H., Grimson, R. J. and Seamark, R. F. 1993. Effect of nutrition during pregnancy on fetal growth and survival in FECB Booroola × South Australian Merino ewes. Theriogenology 39: 623–630.
Kleemann, D. O., Walker, S. K., Walkey, J. R. W., Smith, D. H., Ponzoni, R. W. and Seamark, R. F. 1990. Factors in.uencing lamb survival in high fecundity Booroola Merino × South Australian Merino flocks. Theriogenology 33: 965–976.
Liebovich, H., Gertler, A., Bazer, F. W. and Gootwine, E. 2000. Immunization of sheep against placental lactogen: effects on conception rate, ewe's hormone plasma levels during pregnancy and lamb birth weight. Animal Reproduction Science 64: 33–47.
Magid, A. F., Swanson, V. B., Brinks, J. S., Dickerson, G. E. and Smith, G. M. 1981. Border Leicester and Finnship crosses. II. Productivity of F1 ewes. Journal of Animal Science 52: 1262–1271.
Manalu, W. and Sumaryadi, M. Y. 1998. Maternal serum progesterone concentration during pregnancy and lamb birth weight at parturition in Javanese Thin-Tail ewes with different litter sizes. Small Ruminant Research 30: 163–169.
Mesa, H., Safranski, T. J., Fischer, K. A., Cammack, K. M. and Lamberson, W. R. 2005. Selection for placental efficiency in swine: genetic parameters and trends. Journal of Animal Science 83: 983–991.
Nimbkar, C., Ghalsasi, P. M., Ghatge, R. R. and Gray, G. D. 1998. Establishment of prolific Garole sheep from West Bengal in the semi-arid Deccan Plateau of Maharashtra. Proceeding of the sixth world congress on genetics applied to livestock production, Armidale, vol. 25, pp. 257–260.
Notter, D. R., Borg, R. C. and Kuehn, L. A. 2005. Adjustment of lamb birth and weaning weights for continuous effects of dam age. Animal Science 80: 241–248.
Notter, D. R. and Copenhaver, J. S. 1980. Performance of Finnish Landrace crossbred ewes under accelerated lambing. II. Lamb growth and survival. Journal of Animal Science 51: 1043–1050.
Olson, L. W., Dickerson, G. E. and Glimp, H. A. 1976. Selection criteria for intensive market lamb production: growth traits. Journal of Animal Science 43: 78–89.
Osgerby, J. C., Wathes, D. C., Howard, D. and Gadd, T. S. 2002. The effect of maternal undernutrition on ovine fetal growth. Journal of Endocrinology 173: 131–141.
Ploumi, K. and Emmanouilidis, P. 1999. Lamb and milk production traits of Serrai sheep in Greece. Small Ruminant Research 33: 289–292.
Poindron, P., Nowak, R., Oldham, C. M. and Lindsay, D. R. 1996. The reproductive behavior of prolific sheep. In Prolific sheep (ed.Fahamy, M. H.), pp. 471–483. CAB International, Wallingford.
Rastogi, R. K. 1996. The Barbados Blackbelly. In Prolific sheep (ed. Fahamy, M. H.), pp. 121–136. CAB International, Wallingford.
Razungles, J., Tchamitchian, L., Bebi, B., Lefevre, C., Brunel, J. C. and Ricordeau, G. 1985. The performance of Romanov crosses and their merit as a basis for selection. In Genetics of reproduction (ed. Land, R. B. and Robinson, D. W.), pp. 39–45. Butterworths, London.
Rhind, S. M., Robinson, J. J. and McDonald, I. 1980. Relationship among uterine and placental factors in prolific ewes and their relevance to variation in foetal weight. Animal Production 30: 115–124.
Robinson, J. J., Sinclair, K. D. and McEvoy, T. G. 1999. Nutritional effects on foetal growth. Animal Science 68: 315–331.
Shinozaki, K. and Kira, T. 1956. Intraspecific competition among higher plants. VII. Logistic theory of the C-D effect. Journal of Institutes and Polytechnics, Osaka City University Series D 7: 35–72.
Sormunen-Cristian, R. and Suvela, M. 1999. Out-of-season lambing of Finnish Landrace ewes. Small Ruminant Research 31: 265–272.
Statistical Analysis Systems Institute. 2001. Jump In®, user's guide version 4. Duxbury, CA.
Symonds, M. E., Budge, H., Stephenson, T. and McMillen, I. C. 2001. Fetal endocrinology and development – manipulation and adaptation to long term nutritional and environmental challenges. Reproduction 121: 853–862.
Willey, R. W. and Heath, S. B. 1969. The quantitative relationships between plant population and crop yield. Advances in Agronomy 21: 281–321.
Wilson, M. E. and Ford, S. P. 2001. Comparative aspects of placental efficiency. Reproduction 58: (suppl.) 223–232.