Follicular dynamics and plasma FSH and progesterone concentrations during follicular deviation in the first post-ovulatory wave in Nelore (Bos indicus) heifers

Animal Reproduction Science
Caliê CastilhoLeonardo F C Brito

Abstract

The objective of the present study was to characterize ovarian follicular dynamics and hormone concentrations during follicular deviation in the first wave after ovulation in Nelore (Bos indicus) heifers. Ultrasonographic exams were performed and blood samples were collected every 12h from the day of estrus until 120-144 h after ovulation in seven females. Deviation was defined as the point at which the growth rate of the dominant follicle became greater than the growth rate of the largest subordinate follicle. Deviation occurred approximately 65 h after ovulation. Growth rate of the dominant follicle increased (P<0.05) after deviation, while growth rate of the subordinate follicle decreased (P<0.05). Diameter of the dominant follicle did not differ from the subordinate follicle at deviation (approximately 5.4mm). The dominant follicle (7.6mm) was larger (P<0.05) than the subordinate follicle (5.3mm) 96 h after ovulation or 24h after deviation. Plasma FSH concentrations did not change significantly during the post-ovulatory period. The first significant increase in mean plasma progesterone concentration occurred on the day of follicular deviation. In conclusion, the interval from ovulation to follicular deviation (2.7 days) was...Continue Reading

References

Aug 22, 2001·Biology of Reproduction·O J GintherK Kot
Aug 22, 2001·Biology of Reproduction·L J KulickO J Ginther
Oct 24, 2001·Biology of Reproduction·R SartoriM C Wiltbank
Jun 24, 2003·Animal Reproduction Science·G A BóM F Martínez
May 25, 2005·Theriogenology·Evandro S SartorelliCiro M Barros
Jun 1, 1997·Theriogenology·R A FigueiredoJ M Soler

❮ Previous
Next ❯

Citations

Mar 11, 2011·Animal Reproduction Science·R Sartori, C M Barros
Mar 5, 2008·Theriogenology·L U GimenesP S Baruselli
Jul 9, 2013·Animal Science Journal = Nihon Chikusan Gakkaihō·Jakkhaphan ChasombatThevin Vongpralub
Apr 16, 2009·Reproduction in Domestic Animals = Zuchthygiene·F M MonteiroC M Barros
Jan 20, 2020·Journal of Animal Science·Reinaldo F CookeJosé L M Vasconcelos
Dec 17, 2009·Reproduction, Fertility, and Development·Ciro M BarrosMarcelo F G Nogueira

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.