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Abstract

The objective of this study was to determine if there are differences in luteal size (LS), progesterone (P4), and luteal blood flow (LBF) between pregnant and non-pregnant Bos indicus dairy cows during the first three weeks after insemination, and whether these parameters are related to each other. ...

Author(s)
Hassan, M.; Arshad, U.; Bilal, M.; Sattar, A.; Avais, M.; Bollwein, H.; Ahmad, N.
Publisher
Society for Reproduction and Development, Tokyo, Japan
Citation
Journal of Reproduction and Development, 2019, 65, 1, pp 29-36
Abstract

This study aimed to evaluate the use of low- or high-dose intravaginal progesterone (P4)-releasing devices on pregnancy rates of Zebu heifers submitted to fixed-timed artificial insemination (TAI). Pubertal Bos indicus Nellore heifers were injected at day 0 with 2 mg estradiol benzoate (EB) and...

Author(s)
Natal, F. L. N.; Pacheco, M. D.; Alvarez, R. H.
Publisher
Instituto de Zootecnia, Nova Odessa, Brazil
Citation
Boletim de Indústria Animal, 2019, 76, pp unpaginated
AbstractFull Text

The thermal comfort of crossbred dairy cows prior to artificial insemination and the relation with the conception rate were evaluated. This study was carried out in Uberlândia, Minas Gerais, Brazil, characterized by a dry winter and a rainy summer, in which was used 112 crossbred dairy cows, whose...

Author(s)
Hooper, H. B.; Salomão, D. de O. S.; Ayres, G. F.; Titto, C. G.; Santos, R. M. dos; Nascimento, M. R. B. de M.
Publisher
Pontificia Universidade Católica do Paraná, São José dos Pinhais, Brazil
Citation
Revista Acadêmica: Ciência Animal, 2018, 16, Special edition, pp e161006
Abstract

Objective: To investigate the effect of concentration of progesterone (P4) before artificial insemination (AI) on fertility in ovulatory or anovulatory Bos indicus cattle. Design: Randomised control study. Methods: The study included 162 heifers and 96 lactating cows. On days -10 to -12, animals...

Author(s)
Cavalieri, J.; Gaina, C.; Hepworth, G.
Publisher
Wiley, Melbourne, Australia
Citation
Australian Veterinary Journal, 2018, 96, 9, pp 346-355
Abstract

Paraoxonase-1 (PON1) activity has been associated with improvement in ovarian function in early postpartum dairy cows and improved in vitro embryo development. The aim of the current study was to evaluate the potential association among PON1 activity and follicular growth, diameter of the...

Author(s)
Castro, N. A.; Pfeifer, L. F. M.; Andrade, J. S.; Rincón, J. A. A.; Pegoraro, L. M. C.; Schneider, A.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2018, 188, pp 130-136
Abstract

Two experiments in Nelore cows subjected to timed artificial insemination (TAI) were designed to compare the influence of the antral follicle count (AFC/AFCs) on (1) ovarian follicular dynamics and (2) conception rates. First, multiparous cows with high (≥45 follicles; n=43) or low (≤15 follicles; ...

Author(s)
Morotti, F.; Moretti, R.; Santos, G. M. G. dos; Silva-Santos, K. C.; Cerqueira, P. H. R.; Seneda, M. M.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2018, 188, pp 170-177
Abstract

The effects of eCG on follicular growth, ovulation, and pregnancy per artificial insemination (P/AI) in multiparous and primiparous Bos indicus beef cows submitted to timed artificial insemination (TAI) were evaluated in three experiments. In experiments 1 (follicular responses; n=64), 2...

Author(s)
Sales, J. N. S.; Bottino, M. P.; Silva, L. A. C. L.; Girotto, R. W.; Massoneto, J. P. M.; Souza, J. C.; Baruselli, P. S.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 86, 9, pp 2290-2295
Abstract

Two experiments were conducted to assess a hormonal strategy developed to reduce animal handling for timed artificial insemination (TAI) with sex-sorted semen. Four-hundred ninety-one (491) suckled beef cows received a progesterone (P4) intravaginal device and 2 mg intramuscular (im) injection of...

Author(s)
Silva, M. A. V.; Santos, C. S.; França, I. G.; Pereira, H. G.; SáFilho, M. F.; Freitas, B. G.; Guerreiro, B. M.; Faquim, A.; Baruselli, P. S.; Torres-Júnior, J. R. S.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 114, pp 159-164
Abstract

Sahiwal cow is Bos indicus which is an important dairy breed of tropical and sub-tropical region. Research on reproduction is rare in this breed. The objectives of the present study were to determine the effect of Ovsynch (OVS) versus prostaglandin F (PG) protocol on estrus response and its...

Author(s)
Mubbashar Hassan; Ali Husnain; Naveed, M. I.; Umair Riaz; Nasim Ahmad
Publisher
Wiley, Tokyo, Japan
Citation
Animal Science Journal, 2017, 88, 3, pp 445-450
Abstract

Increasing use of fixed-time artificial insemination (FTAI) in beef cattle production has presented an opportunity for the use of fresh or chilled semen as an alternative to standard cryopreserved semen. The objective of this study was to examine in vitro sperm function and pregnancy rate of...

Author(s)
Satake, N.; Edwards, S. A. A.; Tutt, D.; McGowan, M. R.; Boe-Hansen, G. B.
Publisher
Wiley, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2018, 53, 2, pp 414-422

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