Results 81 to 90 of about 2,055 (165)

Pregnancy outcome of lactating dairy cows assigned for Presynch-Ovsynch synchronization program and inseminated either at detected standing heat or at scheduled fixed time

Asian Pacific Journal of Reproduction, 2019
Objective: To determine if insemination at standing heat results in a similar or higher pregnancy rate compared with fixed time artificial insemination, and to study some factors affecting the pregnancy rate.
Abdel-Tawab Abdel-Razek Yassyn Khalil, Mahmoud Mohamed Hussein   +1 more
doaj   +1 more source

Extending the interval from presynch to initiation of ovsynch in a presynch-ovsynch protocol did not reduce fertility of lactating dairy cows not detected in estrus that received timed artificial insemination

, 2015
Remarkably, no large scale field study has been conducted to evaluate the reproductive performance of cows synchronized with Presynch-Ovsynch with a 12 versus a 14 d interval from Presynch to the beginning of Ovsynch when cows are inseminated in estrus ...
Wijma, R., Giordano, J. O., Catucuamba, G., Thomas, M. J., Curler, M. D.   +4 more
core   +1 more source

РЕПРОДУКТИВЕН ОТГОВОР ПРИ ПЪРВОТЕЛКИ И МНОГО РАЖДАЛИ БИВОЛИЦИ ОТ ПОРОДАТА БЪЛГАРСКА МУРРА С ОВАРИАЛНА ХИПОФУНКЦИЯ СЛЕД ПРИЛОЖЕНИЕ НА GnRH-PGF2α-GnRH ТЕРАПИЯ

Животновъдни науки, 2014
The aim of the present study was to determine the reproductive response of primiparous and multiparous buffaloes of Bulgarian Murrha breed with ovarian inactivity after GnRH-PGF2α-GnRH (OVSYNCH) therapy.
АНАТОЛИ АТАНАСОВ
doaj  

External progesterone supplementation during the Ovsynch protocol reduces the incomplete luteolysis in dairy cows under heat stress

Macedonian Veterinary Review
The present study aimed to determinate the effect of external progesterone (P4) supplementation on luteolysis in cows under heat stress. Forty-eight (n=48) dairy cows in the period from July September 2018 were part of and at day 35±3 postpartum scored ...
Boris Stojanov, Branko Atanasov, Juraj Grizelj, Silvijo Vince, Ksenija Ilievska, Martin Nikolovski, Toni Dovenski, Marko Samardžija   +7 more
doaj   +1 more source

A COMPARATIVE STUDY OF PRE-SYNCHRONIZATION PROTOCOLS G7G AND eCG PROTOCOL IN DAIRY COWS IN ANBAR GOVERNORATE, IRAQ [PDF]

Assiut Veterinary Medical Journal
This study was conducted on privately-owned dairy farms in Al-Anbar Province, Iraq, from July 2023 to January 2024. The aim of the study was to evaluate the impact of timed artificial insemination (TAI) on the calving interval (CI), days open (DO), and ...
HANI ALRAWI, ‪ISMAEL KORIDI
doaj   +1 more source

Progesterone concentration in milk and blood serum and reproductive efficiency of cows after Ovsynch treatment [PDF]

, 2016
An experiment was conducted to investigate the effects of hormonal synchronization of ovulation on progesterone concentrations in milk and blood serum and on reproductive performance.
Stančić, Blagoje, Gvozdić, Dragan, Vuković, Dejan, Božić, Aleksandar, Relić, Renata, Kucević, Denis   +5 more
core   +1 more source

ESTRATEGIC MANAGEMENT DURING THE TRANSICION PERIOD TO OPTIMISE PRODUCTIVITY AND REPRODUCTIVE PERFORMANCE IN THE DAIRY HERD
MANEJO ESTRATÉGICO DURANTE EL PERIODO DE TRANSICIÓN PARA OPTIMIZAR LA PRODUCCIÓN Y EL COMPORTAMIENTO REPRODUCTIVO GANADO LECHERO

Revista de la Facultad de Medicina Veterinaria y de Zootecnia, 2009
In dairy herds, the interval between calving and pregnancy depend on many factors including preparation of the cow for calving, dietary management before and after calving.
Risco Carlos
doaj  

Effect of three methods of estrus synchronization: Osynch, Co-Synch and Prostaglandin on the fertility of subfertile dairy cows [PDF]

Āsīb/shināsī-i Darmāngāhī-i Dāmpizishkī, 2015
This study was performed to compare the effect of using 3 different estrus synchronization methods (Ovsynch, Co-Synch and Prostaglandin) on the conception rate of subfertile dairy cows.
habib cheraghi, khosro Parsaeimehr, ali hosseinkhani, sadegh alijani, hossein daghighkia   +4 more
doaj  

The Influence of the Interval between Administration of PGF2α, in the Pre-Synchronization Treatments (2xPGF2α), in the Ovsynch Synchronization Program of the Oestrus and the Ovulations in Dairy Cows

Scientific Papers Animal Science and Biotechnologies, 2023
The results of synchronization of estrus and ovulation by Ovsynch program can be improved if stages of estrous cycles in cows are synchronized, through two administrations of PGF2α, before the administration the first dose of GnRH.
Nicolae Păcala, Casiana Şipeţan Ciolac, Ioan Bencsik, Dorel Dronca, Gabi Dumitrescu, Eliza Simiz, Marioara Nicula, Valer Carabă, Adela Marcu, Liliana Petculescu-Ciochina, Marinel Șipețan, Cosmin Ganţă   +11 more
doaj  

The Ovsynch Breeding Program for Dairy Cows: A Review and Economic Perspective

, 2001
Heat detection is the single biggest impediment to improved reproductive performance in many dairy herds. Recently, a program for synchronization of ovulation ("Ovsynch") has been developed, which allows for breeding by scheduled artificial insemination.
LeBlanc, Stephen
core   +1 more source