Comparison of progesterone-based protocols with gonadotropin-releasing hormone or estradiol benzoate for timed artificial insemination or embryo transfer in lactating dairy cows  J.L.M. Vasconcelos, D.T.G. Jardina, O.G. Sá Filho, F.L. Aragon, M.B. Veras  Theriogenology  Volume 75, Issue 6, Pages 1153-1160 (April 2011) DOI: 10.1016/j.theriogenology.2010.11.027 Copyright © 2011 Elsevier Inc. Terms and Conditions

Fig. 1 Schematic diagram of the experimental treatments for synchronizing ovulation in lactating Holstein cows. Within each treatment, cows were assigned to receive either fixed-time AI on experimental Day 0 (start of treatment), or fixed-time embryo transfer on Day 7. Pregnancy diagnoses were performed on Days 28 and 60. GnRH, 100 μg im injection of gonadorelin; EB, 2.0 mg im injection of estradiol benzoate; CIDR®, treatment with an intravaginal insert containing 1.9 g of progesterone; PGF2α, 25.0 mg im injection of dinoprost; ECP, 1.0 mg im injection of estradiol cypionate; TAI, Fixed-time artificial insemination; TET, Fixed-time embryo transfer; BS, blood sampling; Temp, evaluation of rectal temperature. Theriogenology 2011 75, 1153-1160DOI: (10.1016/j.theriogenology.2010.11.027) Copyright © 2011 Elsevier Inc. Terms and Conditions