Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Short Supply of High Levels of Guanidine Acetic Acid, Alters Ovarian Artery Flow and Improves Intraovarian Blood Perfusion Area Associated with Follicular Growth in Sheep.
Animals (Basel)
January 2025
School of Veterinary Medicine, Ceará State University (UECE), Fortaleza 60714-903, Ceará, Brazil.
Guanidinoacetic acid (GAA), a precursor of creatine, has a recognized effect on ruminant performance when used as a dietary supplement. However, its impact on reproductive response remains to be elucidated. Therefore, this study aimed to contribute initially to this area by supplementing the diets of ewes with a high dose of GAA, evaluating its effects on reproductive response.
View Article and Find Full Text PDFEfficacy of Fat Supplements with Different Unsaturated/Saturated FA Ratios Undergoing First Postpartum Ovulation in Lactating Anovulatory Goats.
Vet Sci
January 2025
School of Veterinary Medicine, Ceará State University (UECE), Fortaleza 60714-903, CE, Brazil.
We investigated whether microalgae or linseed supply during the early postpartum period affects ovarian restimulation and supports the first postpartum ovulation in lactating anovulatory goats. Thirty-eight An-glo-Nubian-crossbred adult goats were allocated into three groups, one with a control diet ( = 12), fed a total mixed ration (TMR) comprising chopped elephant grass and concentrate; an algal diet ( = 13), fed TMR + green microalgae (1% dry matter); and a linseed diet ( = 13), TMR + linseed (12% dry matter). Supplements were furnished from the second to fifth week (time of weaning).
View Article and Find Full Text PDFStrategic use of estrus intensity to combine timed artificial insemination and embryo transfer in large-scale cattle reproduction programs.
Theriogenology
January 2025
UEL - Universidade Estadual de Londrina, Londrina, PR, Brazil. Electronic address:
This study compared the reproductive performance of three different programs using conventional fixed-time artificial insemination (FTAI), fixed-time embryo transfer (FTET), and their combined use, considering estrus intensity as a criterion for the reproductive program. Brangus multiparous cows (n = 1.100), 40-50 days postpartum, 4-8 years old, and body condition scores 2.
View Article and Find Full Text PDFAdvances in our understanding of the estrous cycle and applications for improving targeted reproductive management in livestock.
Domest Anim Endocrinol
January 2025
USDA, ARS, U.S. Meat Animal Research Center, Clay Center, NE, USA.
The scientific discipline of endocrinology has been invaluable to our understanding of the estrous cycle. In the second half of the twentieth century the development of immunoassay technologies provided a rapid and sensitive method to quantify circulating concentrations of reproductive hormones and relate them to stage of the estrous cycle and physiological status of the animal. Ovarian ultrasonography provided the ability to track the growth and regression of ovarian structures within the same animal across the estrous cycle in real time and, in combination with hormonal profiling, accurately identify mechanisms regulating the estrous cycle and early pregnancy.
View Article and Find Full Text PDFImpact of luteal blood perfusion and expression of estrus on pregnancy rates of Bos taurus embryo recipients exposed to fixed-time embryo transfer.
Anim Reprod Sci
January 2025
University of Georgia, Department of Animal and Dairy Sciences, Athens, GA 30602, USA. Electronic address:
This study evaluated the impact of luteal blood perfusion (BP) and expression of estrus on pregnancy rates of Bos taurus embryo recipients exposed to fixed-timed embryo transfer (FTET) using a gonadotropin-releasing hormone (GnRH)- and progesterone-based ovulation synchronization protocol. Postpartum beef cows (n = 746) were exposed to a GnRH/progesterone-based ovulation synchronization protocol. Luteal morphometry and BP were assessed using color Doppler ultrasonography 9 days after CIDR removal concurrently with FTET.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!