References

Aiumlamai, S., G. Fredriksson and L. Nilsfors, 1992. Real-time ultrasonography for determining the gestational age of ewes. Vet. Rec., 131: 560-562.
PubMed  |  Direct Link  |  

Curran, S. and O.J. Ginther, 1995. M-mode ultrasonic assessment of equine fetal heart rate. Theriogenology, 44: 609-617.
CrossRef  |  

Dawson, L.J., T. Sahlu, S.P. Hart, G. Detweiler and T.A. Gipson et al., 1994. Determination of fetal numbers in Alpine does by real time ultrasonography. Small Ruminant Res., 14: 225-231.
CrossRef  |  

De Bulnes, A.G., J.S. Moreno and A.L Sebastian, 1998. Estimation of fetal development in Manchega dairy ewes by transrectal ultrasonographic measurements. Small Ruminant Res., 27: 243-250.
CrossRef  |  Direct Link  |  

Doize, F., D. Vaillancourt, H. Carabin and D. Belanger, 1997. Determination of gestational age in sheep and goats using trans-rectal ultrasonographic measurement of placentomes. Theriogenology, 48: 449-460.
CrossRef  |  

Ekiz, B., M. Ozcan, A. Yılmaz and A. Ceyhan, 2005. Estimates of phenotypic and genetic parameters for ewe productivity traits of Turkish Merino (Karacabey Merino) sheep. Turk. J. Vet. Anim. Sci., 29: 557-564.
Direct Link  |  

Ekiz, E.E. and M. Ozcan, 2006. Sexual behavior and hormone levels of Kivircik ewes after estrus synchronization during and out of the breeding season. Arch. Tıerzucht, 49: 583-592.
Direct Link  |  

Greenwood, P.L., R. Slepetis, M.J. McPhee and A.W. Bell, 2002. Prediction of stage of pregnancy in prolific sheep using ultrasound measurement of fetal bones. Reprod. Fertility Dev., 14: 7-13.
PubMed  |  Direct Link  |  

Haibel, G.K., 1988. Real-time ultrasonic fetal head measurement and gestational age in dairy goats. Theriogenology, 30: 1053-1057.
PubMed  |  Direct Link  |  

Haibel, G.K., N.R. Perkins and G.M. Lidl, 1989. Breed differences in biparietal diameters of second trimester Toggenburg, Nubian and Angora goat fetuses. Theriogenology, 32: 827-834.
PubMed  |  Direct Link  |  

Hertz, R.H. and I.E. Zador, 1979. Cephalometry by ultrasound: Clinical discussion. Clin. Obstetrics Ginecol., 3: 576-586.

Karen, A.M., E.S.M. Fattouha and S.S. Abu-Zeid, 2009. Estimation of gestational age in Egyptian native goats by ultrasonographic fetometry. Anim. Reprod. Sci., 114: 167-174.

Kelly, R.W. and J.P. Newnham, 1989. Estimation of gestational age in Merino ewes by ultrasound measurement of fetal head size. Aust. J. Agric. Res., 40: 1293-1299.
Direct Link  |  

Kocak, O. and B. Ekiz, 2008. Comparison of different lactation curve models in Holstein cows raised on a farm in the South-Eastern Anatolia Region. Arch. Tierz. Dummerstorf, 51: 329-337.
Direct Link  |  

McDonald, Y., G. Wenham and J.J. Robinson, 1978. Studies on reproduction in prolific ewes. III. The development in size and shape on the foetal skeleton. J. Agric. Sci. Cambridge, 89: 375-391.

Parraguez, V.H., M. Duchens, M. Prado and F. Sales, 2000. Echographic study of the prenatal growth in Suffolk ewes. XI Congreso Nacional de Medicina Veterinaria, Santiago, Chile (Abstract).

Robinson, J.J., I. McDonald, C. Fraser and R.M.J. Crofts, 1977. Studies on reproduction in prolific ewes. 1. Growth of the products of conception. J. Agric. Sci., 88: 539-552.

Sergeev, L., D.O. Kleemann, S.K. Walker, D.H. Smith, T.I. Grosser, T. Mann and R.F. Seamark, 1990. Real-time ultrasound imaging for prediction ovine fetal age. Theriogenology, 34: 593-601.
PubMed  |  Direct Link  |  

Zipper, N., K.H. Kaulfuss, J. May and K. Elze, 1997. Real-time ultrasonographic pregnancy diagnosis (B-mode) in sheep. 3. Determination of the number of embryos and fetuses. Tierarztl Prax, 25: 212-222.
PubMed  |  Direct Link  |