Allrich RD. 1994. Endocrine and neural control of estrus in dairy cows. J Dairy Sci, 77:2738-2744.

Baruselli PS, Sales JNS, Sala RV, Viera LM, Sá Filho MF. 2012. History, evolution and perspectives of timed artificial insemination programs in Brazil. Anim Reprod, 9:139-152.

Binelli M, Sartori R, Vasconcelos JLM, Monteiro Jr PLJ, Pereira MHC, Ramos RS. 2014. Evolution in fixed-time: from synchronization of ovulation to improved fertility. In: 2014 Proceedings 9th International Ruminant Reproduction Symposium, Obihiro City, Hokkaido, Japan. Burton-On-Trent, UK: Context. pp. 493-506.

Bisinotto RS, Ribeiro ES, Martins LT, Marsola RS, Greco LF, Favoreto MG, Risco CA, Thatcher WW, Santos JEP. 2010. Effect of interval between induction of ovulation and artificial insemination (AI) and supplemental progesterone for resynchronization on fertility of dairy cows subjected to a 5-d timed AI program. J Dairy Sci, 93:5798-5808.

Bleach EC, Glencross RG, Knight PG. 2004. Association between ovarian follicle development and pregnancy rates in dairy cows undergoing spontaneous oestrous cycles. Reproduction, 127:621-629.

Brusveen DJ, Souza AH, Wiltbank MC. 2009. Effects of additional prostaglandin F2α and estradiol-17β during Ovsynch in lactating dairy cows. J. Dairy Sci, 92:1412-1422.

Buhi WC. 2002. Characterization and biological roles of oviduct-specific, oestrogen-dependent glycoprotein. Reproduction, 123:355-362.

Cerri RLA, Santos JEP, Juchem SO, Galvao KN, Chebel RC. 2004. Timed artificial insemination with estradiol cypionate or insemination at estrus in high-producing dairy cows. J Dairy Sci, 87:3704-3715.

Cerri RLA, Rutigliano HM, Chebel RC, Santos JEP. 2009. Period of dominance of the ovulatory follicle influences embryo quality in lactating dairy cows. Reproduction, 137:813-823.

Demetrio DG, Santos RM, Demetrio CG, Vasconcelos JLM. 2007. Factors affecting conception rates following artificial insemination or embryo transfer in lactating Holstein cows. J Dairy Sci, 90:5073-5082.

Giordano JO, Wiltbank MC, Fricke PM, Bas S, Pawlisch R, Guenther JN, Nascimento AB. 2013. Effect of increasing GnRH and PGF2alpha dose during Double-Ovsynch on ovulatory response, luteal regression, and fertility of lactating dairy cows. Theriogenology, 80:773-783.

Hillegass J, Lima FS, Sá Filho MF, Santos JEP. 2008. Effect of time of artificial insemination and supplemental estradiol on reproduction of lactating dairy cows. J Dairy Sci, 91:4226-4237.

Jinks EM, Smith MF, Atkins JA, Pohler KG, Perry GA, Macneil MD, Roberts AJ, Waterman RC, Alexander LJ, Geary TW. 2013. Preovulatory estradiol and the establishment and maintenance of pregnancy in suckled beef cows. J Anim Sci, 91:1176-1185.

Martins JPN, Policelli RK, Neuder LM, Raphael W, Pursley JR. 2011. Effects of cloprostenol sodium at final prostaglandin F2α of Ovsynch on complete luteolysis and pregnancy per artificial insemination in lactating dairy cows. J Dairy Sci, 94:2815-2824.

Melo LF, Monteiro PLJ, Surjus RS, Drum JN, Wiltbank MC, Sartori R. 2016. Progesterone-based fixed-time artificial insemination protocols for dairy cows: gonadotropin-releasing hormone versus estradiol benzoate at initiation and estradiol cypionate versus estradiol benzoate at the end. J Dairy Sci, 99:9227-9237.

Meneghetti M, Sa Filho OG, Peres RF, Lamb GC, Vasconcelos JL. 2009. Fixed-time artificial insemination with estradiol and progesterone for Bos indicus cows I: basis for development of protocols. Theriogenology, 72:179-189.

Miller BG, Moore NW, Murphy L, Stone GM. 1977. Early pregnancy in the ewe: effects of oestradiol and progesterone on uterine metabolism and on embryo survival. Aust J Biol Sci, 30:279-288.

Monteiro PL, Jr, Borsato M, Silva FL, Prata AB, Wiltbank MC, Sartori R. 2015. Increasing estradiol benzoate, pretreatment with gonadotropin-releasing hormone, and impediments for successful estradiol-based fixed-time artificial insemination protocols in dairy cattle. J Dairy Sci, 98:3826-3839.

Pereira MHC, Rodrigues ADP, Martins T, Oliveira WVC, Silveira PSA, Wiltbank MC, Vasconcelos JLM. 2013a. Timed artificial insemination programs during the summer in lactating dairy cows: comparison of the 5-d Cosynch protocol with an estrogen/progesterone-based protocol. J Dairy Sci, 96:6904-6914.

Pereira MHC, Sanches CP, Guida TG, Rodrigues ADP, Aragon FL, Veras MB, Borges PT, Wiltbank MC, Vasconcelos JLM. 2013b. Timing of prostaglandin F2α treatment in an estrogen-based protocol for timed artificial insemination or timed embryo transfer in lactating dairy cows. J Dairy Sci, 96:2837-2846.

Pereira MHC, Rodrigues ADP, De Carvalho RJ, Wiltbank MC, Vasconcelos JLM. 2014. Increasing length of an estradiol and progesterone timed artificial insemination protocol decreases pregnancy losses in lactating dairy cows. J Dairy Sci, 97:1454-1464.

Pereira MHC, Wiltbank MC, Barbosa LFSP, Costa WM, Carvalho MAP, Vasconcelos JLM. 2015. Effect of adding a gonadotropin-releasing-hormone treatment at the beginning and a second prostaglandin F-2 alpha treatment at the end of an estradiol-based protocol for timed artificial insemination in lactating dairy cows during cool or hot seasons of the year. J Dairy Sci, 98:947-959.

Pereira MHC, Wiltbank MCVasconcelos JLM. 2016. Expression of estrus improves fertility and decreases pregnancy losses in lactating dairy cows that receive artificial insemination or embryo transfer. J Dairy Sci, 99:2237-2247.

Pereira MHC, Sanches CP, Guida TG, Wiltbank MC, Vasconcelos JLM. 2017a. Comparison of fertility following use of one versus two intravaginal progesterone inserts in dairy cows without a CL during a synchronization protocol before timed AI or timed embryo transfer. Theriogenology, 89:72-78.

Pereira MHC, Wiltbank MC, Guida TG, Lopes FR, Vasconcelos JLM. 2017b. Comparison of 2 protocols to increase circulating progesterone concentration before timed artificial insemination in lactating dairy cows with or without elevated body temperature. J Dairy Sci, 100:8455-8470.

Peres RF, Claro I Jr, Sa Filho OG, Nogueira GP, Vasconcelos JLM. 2009. Strategies to improve fertility in Bos indicus postpubertal heifers and nonlactating cows submitted to fixed-time artificial insemination. Theriogenology, 72:681-689.

Perry GA, Smith MF, Lucy MC, Green JA, Parks TE, MacNeil MD, Roberts AJ, Geary TW. 2005. Relationship between follicle size at insemination and pregnancy success. Proc Natl Acad Sci USA, 102:5268-5273.

Perry GA, Swanson OL, Larimore EL, Perry BL, Djira GD, Cushman RA. 2014. Relationship of follicle size and concentrations of estradiol among cows exhibiting or not exhibiting estrus during a fixed-time AI protocol. Domest Anim Endocrinol, 48:15-20.

Peters MW, Pursley JR. 2003. Timing of final GnRH of the Ovsynch protocol affects ovulatory follicle size, subsequent luteal function, and fertility in dairy cows. Theriogenology, 60:1197-1204.

Pursley JR, Mee MO, Wiltbank MC. 1995. Synchronization of ovulation in dairy cows using PGF2alpha and GnRH. Theriogenology, 44:915-923.

Pursley JR, Kosorok MR, Wiltbank MC. 1997. Reproductive management of lactating dairy cows using synchronization of ovulation. J Dairy Sci, 80:301-306.

Ribeiro ES, Monteiro AP, Lima FS, Ayres H, Bisinotto RS, Favoreto M, Greco LF, Marsola RS, Thatcher WW, Santos JEP. 2012. Effects of presynchronization and length of proestrus on fertility of grazing dairy cows subjected to a 5-day timed artificial insemination protocol. J Dairy Sci, 95:2513-2522.

Sangsritavong S, Combs DK, Sartori R, Armentano LE, Wiltbank MC. 2002. High feed intake increases liver blood flow and metabolism of progesterone and estradiol-17 beta in dairy cattle. J Dairy Sci, 85:2831-2842.

Santos JEP, Narciso CD, Rivera F, Thatcher WW, Chebel RC. 2010. Effect of reducing the period of follicle dominance in a timed artificial insemination protocol on reproduction of dairy cows. J Dairy Sci, 93:2976-2988.

Souza AH, Gumen A, Silva EPB, Cunha AP, Guenther JN, Peto CM, Caraviello DZ, Wiltbank MC. 2005. Effect of estradiol-17 beta supplementation before the last GnRH of the Ovsynch protocol in high producing dairy cows. J Dairy Sci, 88:170-170.