5Siva E,Sterry R A,Kolb D,et al.Accuracy of pregnancy-as-sociated glycoprotein ELISE to determine pregnancy status of lactating dairy cows twenty-seven days after timed artificial in semination[J].J Dairy Sci,2007,90(10):4612-4622.
6Piechotta M,Bollwein J,Friedrich M,et al.Comparison of commercial ELISE blood tests for early pregnancy detection in dairy cows[J].J Report Dev,2010,57(1):72-75.
7Romano J E,Larson J E.Accuracy of pregnancy specific protein B test for early pregnancy diagnosis in dairy cattle[J].Theriogenology,2010,74(6):932-939.
8Green J C.Newsom E M.Lucy M C.Incorporation of a rapid pregnancy associated glycoprotein ELLESA into a CIDR-Ovsynch resynchronization program for a 28day re-insemination interval[J].Theriogenology,2011,75(2):320-328.
5Ayad A,Sousa N M,Sulon J,et al. Comparison of five radioimmunoassay systems for PAG measurement: ability to detect early pregnancy in cows.[J]. Reprod Domest Anita,2007,42(4) : 433-440.
6Butler J E, Hamilton W C,Sasser R G, et al. Detection and par- tial characterization of two bovine pregnancy-specific proteins[J]. Biol Reorod.1982.26(5), 925-933.
7El Amiri B,Remy B,Sousa N M,et al. Isolation and partial characterization of three pregnancy-associated glycoproteins from the ewe plaeenta[J]. Mol Reprod Dev,2003,64(2): 199-206.
8E1-Battawy K A, Sousa N M, Szenci O, et al. Pregnancy-associated glycoprotein profile during the first trimester of pregnancy in Egyptian buffalo cows[J]. Reprod Domest Anita,2009,44(2): 161-166.
9Friedrich M, Holtz W. Establishment of an ELISA for measuring bovine pregnancy-associated glycoprotein in serum or milk and its application for early pregnancy detection[J]. Reprod Domest Anim,2010,45(1) :142-146.
10Gajewski Z, Melo De Sousa N, Beckers J F, et al. Concentration of bovine pregnancy associated glycoprotein in plasma and milk: its application for pregnancy diagnosis in cows [J]. J Physiol Pharmacol,2008,59(Suppl 9) : 55-64.