Results 141 to 150 of about 712 (184)

Effect of presynchronization with prostaglandin F2α before the 5-d timed AI protocol on ovarian responses and pregnancy in dairy heifers.

Theriogenology, 2019
The objectives were the determine the effects of presynchronization with PGF2α 2 days before the 5-d timed artificial insemination (AI) protocol on ovarian responses and pregnancy per AI (P/AI) in dairy heifers. The hypothesis was that PGF2α would induce
E. Karakaya-Bilen, E. Ribeiro, R. Bisinotto, A. Gümen, J. Santos   +4 more
semanticscholar   +2 more sources

Effect of presynchronization strategy before Ovsynch on fertility at first service in lactating dairy cows

Theriogenology, 2012
The aim of this study was to evaluate the effect of presynchronization with or without the detection of estrus on first service pregnancy per artificial insemination (P/AI) and on Ovsynch outcome in lactating dairy cows.
Milo C Wiltbank, Gülnaz Yılmazbaş-Mecitoğlu, A Keskin   +2 more
exaly   +3 more sources

Reproduction in Dairy Cows Following Progesterone Insert Presynchronization and Resynchronization Protocols

Journal of Dairy Science, 2006
The objectives of this study were to evaluate the effects of an intravaginal insert containing progesterone (CIDR, controlled internal drug releasing) administered in presynchronization and resynchronization protocols on cyclicity, detection of estrus ...
Rutigliano Heloisa, Jose E.P. Santos, R L A Cerri   +2 more
exaly   +2 more sources

Effects of Method of Presynchronization and Source of Selenium on Uterine Health and Reproduction in Dairy Cows

Journal of Dairy Science, 2008
The objectives of this study were to evaluate the effects of method of presynchronization and source of supplemental Se on uterine health and reproductive performance of lactating dairy cows. Holstein cows (n = 512) were assigned randomly to 2 methods of
Fabio S. Lima, Rutigliano Heloisa, Jose E.P. Santos   +2 more
exaly   +2 more sources

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Presynchronization Control for Grid-Connected Inverters Without Grid Voltage Sensors

IEEE transactions on power electronics, 2023
The grid voltage sensorless control for grid-connected inverters samples the line current to estimate the voltage at the point-of-common-coupling and achieve grid synchronization.
Tian-Qi Liu, Peng Wang, Junpeng Ma, Rui Zhang, Shun-Liang Wang, Zihao Wu, Ruogu Wang   +6 more
semanticscholar   +1 more source

Evaluation of two beef cow fixed-time AI protocols that utilize presynchronization.

Theriogenology, 2023
Presynchronization was evaluated as a method to improve estrus response before fixed-time AI (FTAI). The objective was to compare FTAI results in beef cows from two different presynchronization approaches. Blood samples were collected on Day -14 (Day 0 = 
J. Ketchum, L. Quail, K. Epperson, C. Guy, J. Rich, S. Zoca, A. Kline, T. Andrews, Julie A. Walker, Pedro Levy Piza Fontes, S. K. Johnson, M. Owen, Douglas Eborn, Kelsey Harvey, A. Summers, George A. Perry   +15 more
semanticscholar   +1 more source

Seamless Transition for Parallel Inverters With Novel Self-Adaptive Hybrid Controller and Presynchronization Unit

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2022
This article proposes a seamless transition strategy between grid-connected (GC) and stand-alone (SA) states for a microgrid (MG) consisting of parallel inverters. Most inverters in MG operate with novel self-adaptive hybrid controllers, and one inverter
Xin Meng, Huizhu Guo, Xueqing Wang, Mingzhi He, Jin-Jun Liu   +4 more
semanticscholar   +1 more source

Inducing luteolysis prior to atresia of the first follicular wave by altering the interval to prostaglandin F2ɑ administration after long-term progestin presynchronization.

Theriogenology, 2023
A series of experiments was designed to evaluate treatment schedules for control of the estrous cycle in which luteolysis is induced prior to atresia of the first follicular wave following a long-term progestin presynchronization treatment in beef ...
Genevieve M. VanWye, Emily G. Smith, Christine M Spinka, Michael F. Smith, M. Lucy, Jordan M. Thomas   +5 more
semanticscholar   +1 more source

Factors affecting reproductive outcomes in lactating dairy cows that undergo presynchronization-Ovsynch and successive resynchronization programs.

Theriogenology, 2022
This study was designed to identify the factors affecting reproductive outcomes in lactating dairy cows undergoing Presynchronization-Ovsynch and successive resynchronization programs.
Illhwa Kim, Jaekwan Jeong, Hyun-Gu Kang
semanticscholar   +1 more source