Ahmed, WM., Hanafi, EM., Ali, AH., Zaabal, M., & Elkhadrawy, H. (2015). Some Managemental and Reproductive Aspects in Relation to Subsequent Fertility in Transitional Cows. Middle-East Journal of Scientific Research, 23(11):2748-55.
Ali, A. (2004). Effect of gestational age and fetal position on the possibility and accuracy of ultrasonographic fetal gender determination in dairy cattle. Reproduction in domestic animals, 39(3):190-4.
AssisNeto, AC., Pereira, F., Santos, TCd., Ambrosio, C., Leiser, R., & Miglino, M. (2010). Morphophysical Recording of Bovine Conceptus (bos indicus) and Placenta from Days 20 to 70 of Pregnancy. Reproduction in domestic animals, 45(5):760-72.
Bertolini, M., Mason, JB., Beam, SW., Carneiro, GF., Sween, ML., & Kominek et al. (2002). Morphology and morphometry of in vivo-and in vitro-produced bovine concepti from early pregnancy to term and association with high birth weights. Theriogenology, 58(5):973-94.
Dufour, S., Durocher, J., Dubuc, J., Dendukuri, N., Hassan, S., & Buczinski, S. (2017). Bayesian estimation of sensitivity and specificity of a milk pregnancy-associated glycoprotein-based ELISA and of transrectal ultrasonographic exam for diagnosis of pregnancy at 28–45 days following breeding in dairy cows. Preventive veterinary medicine,140: 122-133.
Kähn, W., & Volkmann, D. (2004). Veterinary reproductive ultrasonography: Schlütersche.
Kähn, W. (1989). Sonographic fetometry in the bovine. Theriogenology, 31(5):1105-21.
Kramer, R., Smith, D., Rupp, G., Griffin, D., & Funston, R. (2016). Estimation of calving date in beef cattle with real-time ultrasound. The Professional Animal Scientist, 32: 322-327.
Labhubhai, B.H. (2010). Induction and synchronization of estrus in postpasture anoestrus kankrej coes: Anand agricultural university, Anand.
Lamb, C. (2004). Reproductive ultrasound for management of beef cattle. Reproductive Management Course Appendix, 1-18.
Lazim, EH., Alrawi, H.M., & Aziz, D.M. (2016). Relationship between gestational age and transabdominal ultrasonographic measurements of fetus and uterus during the 2nd and 3rd trimester of gestation in cows. Asian Pacific Journal of Reproduction, 5: 326-330.
López-Gatius, F., Andreu-Vázquez, C., Mur-Novales, R., Cabrera, V., & Hunter, R. (2017). The dilemma of twin pregnancies in dairy cattle. A review of practical prospects. Livestock Science, 197: 12-16.
Medan, M.S., & El-Aty, A.A. (2010). Advances in ultrasonography and its applications in domestic ruminants and other farm animals reproduction. Journal of Advanced Research, 1(2):123-8.
Mee, J., Buckley, F., Ryan, D., & Dillon, P. (2009). Pre‐breeding Ovaro–Uterine Ultrasonography and its Relationship with First Service Pregnancy Rate in Seasonal‐Calving Dairy Herds. Reproduction in domestic animals, 44: 331-337.
Munde, V. (2006). Ultrasonographic Diagnosis of Early Pregnancy in Buffalo: MAFSU, Nagpur.
Noakes, D.E., Parkinson, T.J., & England, G.C. (2018). Arthur's Veterinary Reproduction and Obstetrics-E-Book, Elsevier Health Sciences.
Patel, J.A., (2004). Management of repeat breeding holstein friesian cows through ultrasonography, blood profile and hormonal therapy under Subtropical climate: Anand Agricultural University, Anand.
Pathan, M., & Pampori, Z. (2011). Real-Time Ultrasonography as a Diagnostic Tool in Bovine Reproduction. feedback, 6(2):88.
Wagener, K., Gabler, C., & Drillich, M. (2017). A review of the ongoing discussion about definition, diagnosis and pathomechanism of subclinical endometritis in dairy cows. Theriogenology, 94: 21-30.