Morphometry and depth of inseminating catheter penetration in prolific and non- prolific ewes at different ages: A post mortem study

Animal Reproduction Science
Kaoutar El KhalilBouchra El Amiri

Abstract

The ewe's cervix structure is highly variable among females, which may limit the application of transcervical artificial insemination (TCAI). This work aimed to study the variation in cervix anatomy in two different prolificacy breeds (D'man a prolific and Boujaâd a non-prolific sheep). Reproductive tracts were collected from D'man (n = 64) and Boujaâd (n = 187) females aged between 1 and 4 years. The weight of the uterus, length of the cervix and depth of penetration of the inseminating pipette were recorded. The number of cervical rings was counted and their arrangement graded. The cervix anatomy of D'man ewes differs from that of Boujaâd. The cervix morphology of Boujaâd ewes is more complex compared to D'man ewes; this complexity depends on the age of the ewe. No significant difference was found regarding the depth of penetration of the insemination catheter for the two breeds at 1, 2 and 4 years old (P > 0.05). However, at 3 years old, the highest depth of penetration (P < 0.05) was recorded in D'man ewes. In addition, for both breeds, grade 2 was the most frequent (P < 0.05), and the cervix became less complicated for TCAI with advanced age (4 years old). To conclude, the cervix of D'man ewes is less complex and more favo...Continue Reading

Citations

Oct 19, 2019·Reproduction in Domestic Animals = Zuchthygiene·Mercedes AlvarezLuis Anel

❮ 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.