Reproduction in Domestic Animals
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Factors Affecting Oocyte Quality: Who is Driving the Follicle?Contents Mammalian ovaries contain a large stock of oocytes enclosed in primordial follicles. Ovarian cyclic activity induces some of these follicles to initiate growth towards a possible ovulation. However, most of these follicles terminate their growth at any moment and degenerate through atresia. In growing follicles, only a subset of oocytes are capable to suppo... ... hiện toàn bộ
Reproduction in Domestic Animals - Tập 43 Số s2 - Trang 393-400 - 2008
Development of Procedures for Sex‐sorting Frozen–Thawed Bovine SpermatozoaContents Dairy bull sperm may be sex‐sorted, frozen and used to artificially inseminate heifers with acceptable fertility if the herd is well‐managed. One drawback to the technology is that donor bulls must be located within a short distance of the sorting facility in order to collect semen, which limits the number of bulls from which sorted sperm are available. A s... ... hiện toàn bộ
Reproduction in Domestic Animals - Tập 44 Số 3 - Trang 460-466 - 2009
Reduction of Oxidative Stress in Bovine Spermatozoa During Flow Cytometric SortingContents The goal of the study was to investigate the effect of antioxidant supplementation on the quality of frozen‐thawed flow cytometrically sorted bull spermatozoa. Twelve ejaculates from two Holstein Friesian bulls were sorted according to the Beltsville Sperm Sexing Technology. Each ejaculate was divided into three parts and processed as (i) unsorted controls,... ... hiện toàn bộ
Reproduction in Domestic Animals - Tập 42 Số 1 - Trang 63-67 - 2007
Sex Preselection in Swine: Altered Sex Ratios in Offspring following Surgical Insemination of Flow Sorted X‐ and Y‐Bearing SpermContents: Flow cytometric sorting of X and Y chromosome‐bearing sperm into separate populations, followed by surgical insemination into the isthmus of the oviduct of mature gilts, produced litters with phenotypic sex ratios skewed in the direction of male or female according to the predicted sex of the sperm population inseminated. The skewing of the s... ... hiện toàn bộ
Reproduction in Domestic Animals - Tập 26 Số 6 - Trang 309-314 - 1991
Clinicopathological Features of an Equine Ovarian TeratomaContents The present study describes the clinicopathological features of a mature cystic ovarian teratoma occurred in a 4 year old, cyclic, nulliparous Andalusian mare. The mass was discovered in the left ovary during a breeding soundness examination, and was hard in consistency and variously echogenic. Laparoscopy was performed to confirm the neoplastic change, fol... ... hiện toàn bộ
Reproduction in Domestic Animals - Tập 39 Số 2 - Trang 65-69 - 2004
Pre‐ and Post‐Partum Mild Underfeeding Influences Gene Expression in the Reproductive Tract of Cyclic Dairy CowsContents Undernutrition before and after calving has a detrimental effect on the fertility of dairy cows. The effect of nutritional stress was previously reported to influence gene expression in key tissues for metabolic health and reproduction such as the liver and the genital tract early after calving, but not at breeding, that is, between 70 and 90 days post‐part... ... hiện toàn bộ
Reproduction in Domestic Animals - Tập 48 Số 3 - Trang 484-499 - 2013
Treatment with eCG Decreases the Vascular Density and Increases the Glandular Density of the Bovine UterusContents The uterus plays an essential role in mammalian reproduction and is a target of several hormonal protocols used to improve fertility in cattle. Many studies highlighted the importance of eCG treatment following fixed‐time artificial insemination in improving follicular growth, ovulation and pregn... ... hiện toàn bộ
Reproduction in Domestic Animals - Tập 49 Số 3 - Trang 453-462 - 2014
The Effect of the Intracervical Application of Follicle‐Stimulating Hormone or Luteinizing Hormone on the Pattern of Expression of Gonadotrophin Receptors in the Cervix of Non‐Pregnant EwesContents During the periovulatory period, the cervix relaxes in response to changes in circulating concentrations of reproductive hormones. The present study investigated the role of gonadotrophins in cervical function by examining the expression of follicle‐stimulating hormone receptor (FSHR ) and luteini... ... hiện toàn bộ
Reproduction in Domestic Animals - Tập 49 Số 4 - Trang 568-575 - 2014
Developmental Capabilities of Embryos Produced In Vitro from Prepubertal Lamb OocytesContents Breeding from prepubertal females, known as juvenile in vitro embryo transfer (JIVET), reduces the generation interval and increases the rate of genetic gain in animal breeding programs. While the birth of the first lambs from prepubertal ewes occurred nearly 30 years ago; and there is considerable interest in the commercializatio... ... hiện toàn bộ
Reproduction in Domestic Animals - Tập 43 Số s2 - Trang 137-143 - 2008
Gender‐related Differences in Cytochrome P450 in Porcine Liver – Implication for Activity, Expression and Inhibition by Testicular SteroidsContents In pigs, the hepatic cytochrome P450 (CYP) 1A2, 2A and 2E1 activity is important in the regulation of skatole accumulation in adipose tissue. This study investigated gender‐related differences in CYP1A2, 2A and 2E1 dependent activity, protein and mRNA expression. This study also investigated the gonadal steroid dependent inhibition of CYP activity in relati... ... hiện toàn bộ
Reproduction in Domestic Animals - Tập 46 Số 4 - Trang 616-623 - 2011
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