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Abstract

This study compares the fertility effects of inducing ovulation using the GnRH analogue, dephereline, versus natural GnRH at the end of a 5-day progesterone(P4)-based protocol for fixed-time artificial insemination (FTAI) in heat-stressed and non-heat stressed lactating dairy cows. Cows were given...

Author(s)
Garcia-Ispierto, I.; Rensis, F. de; Pérez-Salas, J. A.; Nunes, J. M.; Pradés, B.; Serrano-Pérez, B.; López-Gatius, F.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Research in Veterinary Science, 2019, 122, pp 170-174
AbstractFull Text

Progesterone is essential for the preparation of the endometrium and the maintenance of pregnancy, so supplementation with progesterone after artificial insemination (AI) could increase fertility in lactating dairy cows. The aim of this study was to determine the effects of treatment with a...

Author(s)
López-Helguera, I.; Tuono, T.; Mur, R.; López-Gatius, F.; Serrano-Pérez, B.
Publisher
Asociación Interprofesional para el Desarrollo Agrario, Zaragoza, Spain
Citation
XVI Jornadas sobre Producción Animal, 19 y 20 de mayo de 2015, Zaragoza, España. Tomo I & II, 2015, pp 346-348
Abstract

This study compares the fertility effects of inducing ovulation using human chorionic gonadotropin (hCG) versus gonadotropin releasing hormone (GnRH) at the end of a 5-day progesterone(P4)-based protocol for fixed-time artificial insemination (FTAI) in heat-stressed and non-heat stressed anestrous...

Author(s)
Garcia-Ispierto, I.; Rensis, F. de; Casas, X.; Caballero, F.; Serrano-Pérez, B.; López-Gatius, F.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 124, pp 65-68
Abstract

This study compares the effects of inducing ovulation using human chorionic gonadotropin (hCG) or gonadotropin releasing hormone (GnRH) at the end of a 5-day progesterone(P4)-based protocol for fixed-time artificial insemination (FTAI) in lactating dairy cows on ovarian dynamics and fertility. A P4 ...

Author(s)
Garcia-Ispierto, I.; Rensis, F. de; Casas, X.; Caballero, F.; Mur-Novales, R.; López-Gatius, F.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 107, pp 175-179
Abstract

Contents The objective of this study was to determine whether fluid drainage from the subordinate follicles by ovum pickup procedures prevents the risk of twin pregnancy without reducing the fertility of the cow. Lactating dairy cows with at least two follicles over 12 mm diameter located one on...

Author(s)
López-Gatius, F.; Hunter, R. H. F.
Publisher
Wiley, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2018, 53, 1, pp 213-216
Abstract

This study sought to examine the impact of the presence of two co-dominant (ovulatory) follicles at the time of artificial insemination (AI) on the ovulatory response to GnRH given in a fixed-time AI protocol. The study population comprised 622 lactating dairy cows: 306 (49.2%) with a single...

Author(s)
López-Gatius, F.; Garcia-Ispierto, I.; Serrano-Pérez, B.; Hunter, R. H. F.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 120, pp 91-97
Abstract

This study examines the possible effects on the reproductive performance of high-producing dairy cows of progesterone (P4) given in the early luteal phase (1.55 g of P4), from Days 3 to 5 post-artificial insemination (AI) as compared with the time of pregnancy recognition, from Days 15 to 17...

Author(s)
Garcia-Ispierto, I.; López-Gatius, F.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 90, pp 20-24
Abstract

This study compared the efficiency of a five-day or standard (nine-day) progesterone-based regimen combined with equine chorionic gonadotrophin (eCG) in a fixed-time AI (FTAI) protocol for dairy cows. The data examined were derived from 3577 inseminations conducted in three dairy herds. Animals...

Author(s)
Garcia-Ispierto, I.; Roselló, M. A.; Rensis, F. de; López-Gatius, F.
Publisher
Society for Reproduction and Development, Tokyo, Japan
Citation
Journal of Reproduction and Development, 2013, 59, 6, pp 544-548
Abstract

Heat stress has consequences on both the physiology and reproductive performance of cows, but the most dramatic effect for dairy producers is the decrease produced in fertility. The effects of heat stress on fertility include an increased number of days open, reduced conception rate, and larger...

Author(s)
Rensis, F. de; Garcia-Ispierto, I.; López-Gatius, F.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2015, 84, 5, pp 659-666
Abstract

This study examines the possible effects of progesterone (P4) supplementation during the time of pregnancy recognition, from Days 15 to 17 post-artificial insemination (AI), on reproductive performance in high-producing dairy cows. Cows in their 15th day post-AI were alternately assigned to a...

Author(s)
Garcia-Ispierto, I.; López-Helguera, I.; Serrano-Pérez, B.; Paso, V.; Tuono, T.; Ramon, A.; Mur-Novales, R.; Tutusaus, J.; López-Gatius, F.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 85, 7, pp 1343-1347

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