AllisonA.J. and Robinson T.J. (1970). The effect of dose level of intravaginal progestagen on sperm transport, fertilization 350 IU of eCG n and lambing in the cyclic Merino ewe.J. Reprod. Fertil. 22, 515-531.
AshworthC.J., Sales D.I. and Wilmut I.(1989). Evidence of an association between the survival of embryos and periovulatory plasma progesterone concentration in the ewe. J. Reprod. Fertil. 87, 23-32.
AtamanM.B., Akoz M. and Akman O.) 2006). Induction of synchronized oestrus in akkaraman cross-bred ewes during breeding and anestrus seasons : the use of short-term and long-term progesterone treatments.Rev. Med. Vet. 5, 257-260.
AtsanT., Emsen E., Yaprak M., Dagdemir V. and Diaz C.A.G.(2007). An economic assessment of differently managed sheep flocks in eastern Turkey. Ital. J. Anim. Sci. 6, 407-414.
BeckN.F.G., Green A., Khan T.H. and Khalid M. (1998). The effects of buserelin (GnRH analogue) or hCG treatment on luteal weight and embryonic development during early pregnancy in the ewe. J. Reprod. Fertil. Abstr. Ser. 21, 95-96.
CamM.A., Kuran M., Yildiz S. and Selcuk E. (2002). Fetal growth and reproductive performance in ewes administered GnRH agonist on day 12 post-mating. Anim. Reprod. Sci. 72, 73-82.
Cam M.A. and Kuran M. (2003). Effects of a single injection of hCG or GnRH agonist on day 12 post mating on fetal growth and reproductive performance of sheep. Anim. Reprod. Sci. Res. 80, 81-90.
DoganI. and Nur Z. (2006).Different estrous induction methods during the non-breeding season in Kivircik ewes. PolishVet. Med. 51(4), 133-138.
FukuiY., Itagaki R., Ishida N. and Okada M. (2001). Effect of different hCG treatments on fertility of estrus-induced and artificially inseminated ewes during the non-breeding season. J. Reprod. Dev. 47, 189-195.
GomezBrunet A., Santiago Moreno J., Montoro V., Garde J., Pons P., Gonzalez Bulnes A. and Opez Sebastian A.L. (2006). Reproductive performance and progesterone secretion in estrus-induced Manchega ewes treated with hCG at the time of AI. Small Rumen. Res. 71, 117-122.
IshidaN., Okada M., Sebata K., Minato M. and Fukui Y. (1999). Effects of GnRH and hCG treatment for enhancing corpus luteum function to increase lambing rate of ewes artificially inseminated during the non-breeding season. J. Reprod. Dev. 45, 73-79.
KhanT.H., Hastie P.M., Beck N.F.G. and Khalid M. (2003). hCG treatment on day of mating improves embryo viability and fertility in ewe lambs. Anim. Reprod. Sci. 76, 81-89.
KleemannD.O., Walker S.K. and Seamark R.F. (1994). Enhanced fetal growth in sheep administered progesterone during the first three days of pregnancy. J. Reprod. Fertil. 102, 411-417.
MoeiniM.M., Alipoor F. and Moghadam A.A. (2009). The effect of human chorionic gonadotropinon the reproduction per formance in Lori sheep synchronized with different doses of pregnant mare serum gonadotrophin outside the breeding season. Asian J. Anim. Vet. Adv. 4(1), 9-15.
NephewK.P., C´ardenas H., Mc Clure K.E., Ott T.L. Bazer F.W. and Pope W.F. (1994). Effects of administration of human gonadotropin or progesterone before maternal recognition of pregnancy on blastocyst development and pregnancy in sheep. J. Anim. Sci. 72, 453-458.
RusselA.J.F., Doney J.M. and Gunn R.G. (1969). Subjective assessment of moderate levels of bodycondition. Anim. Reprod. Sci. 24, 119-126.
ThatcherW.W., Moreira F., Santos J.E.P., Mattos R.C., Lopes F.L., Pancarci S.M. and Risco C.A. (2001). Effects of hormonal treatments on reproductive performance and embryo production. Theriogenology. 55, 75-89.
UngerfeldR. and Rubianes E. (1999). Effectiveness of short-term progestogen primings for the induction of fertile oestrus with eCG in ewes during late seasonal anoestrus. Anim. Sci. 68, 349-353.
UngerfeldR., Suárez G., Gómez G. and Rubianes E. (2000). Respuesta a la introduccion de carneros en ovejas corriedale en anestro estacional pretratadas con diferentes cantidades de medroxiprogesterona (response of Corriedale ewes primed with different amounts of medroxyprogesterone to the introduction of rams during seasonal anestrus), Pp. 28-31 in Proc. 16th Conf. Reunión Lat. Prod. Anim. March. Montevideo, Uruguay.
ViñolesC., Meikle A., Forsberg M. and Rubianes E. (1999). The effect of subluteal levels of exogenous progesterone on follicular dynamics and endocrine patterns during the early luteal phase of the ewe. Theriogenology. 51, 1351-1361.
Zare Shahneh A., Deldar Tajangookeh H., Sadeghipanah H. and Saki A.A. (2006). Effect of controlled internal drug release device treatment duration and eCG dose on reproductive performance of seasonally anestrous fat-tailed Iranian ewes. Pakistan. J. Biol. Sci. 9, 1552-1555.
ZonturluA.K., Aral F., Ozyurtlu N. and Yavuzer U. (2008). Syncronization of estrous using FGA and CIDR intervaginal pessaries during the transition period in Awassi ewes. J. Anim. Vet. Adv. 7(9), 1093-1096.