Read by QxMD icon Read

Animal Reproduction Science

S L Bourgon, M Diel de Amorim, T Chenier, M Sargolzaei, S P Miller, J E Martell, Y R Montanholi
Sexual development in beef bulls appears to be influenced by nutritional plane and feed efficiency. Yearling bulls fed high (GRAIN = 49) and moderate (ROUGHAGE = 109) nutritional planes, were submitted to a performance test where scrotal circumference (SC), scrotum and testis ultrasonograms and hormones were monitored throughout. Scrotal thermographs, blood cell counts and semen were evaluated at the end of the test. Residual feed intake (RFI) was the measure of feed efficiency, and bulls within each population were characterized as efficient and inefficient...
September 7, 2018: Animal Reproduction Science
Blanka Premrov Bajuk, Tina Pihlar, Nina Pogačnik, Primož Klinc
The aim of the present study was to analyze the effect of dialysis on the quality of frozen/thawed buck semen. Ejaculates (n = 15) from three Saanen bucks were divided into three experimental groups. Semen in Group Ce (centrifugation) was processed by standard method and washed two times at 1.085 × g for 20 min. During this time, the diluted control semen (Co) was stored at room temperature. Semen in Group D was dialyzed using 300 kDa cut-off semi-permeable cellulose tubing. The semen from all groups was diluted with extender containing 20% egg yolk and frozen in liquid nitrogen vapor...
September 6, 2018: Animal Reproduction Science
F Saemi, A Zare Shahneh, M Zhandi, A Akhlaghi, Z Ansari Pirsaraei
A hypothesis was tested that long-term administration of thyroxine (T4 ) in broiler breeder hens would affect fertility, sperm penetration rate, and the duration of fertility. Relative abundance of oviductal TGF-β4 and HSP70 mRNA was determined to ascertain whether T4 treatment affected these genes, and modulated the sustained storage of spermatozoa within the uterovaginal sperm storage tubules of hens. A total of 70, 47-week-old Cobb 500 breeder hens was randomly allotted to two treatment groups (T4 treatment (ET) and control)...
September 6, 2018: Animal Reproduction Science
Xiaopeng Li, Qiongxian Yan, Shaoxun Tang, Zhiliang Tan, Carolyn Jean Fitzsimmons, Kangle Yi
Maternal nutrition during gestation is a leading factor of modifying the foetal epigenome and phenotype for mammals. Imprinting genes have important roles in regulating foetal growth, programming and development. There, however, are limited data available on the effects of feed intake restriction on the expression of imprinting genes in pregnant goats. The present study, therefore, was conducted to assess the effects of maternal feed intake restriction on the relative abundance of mRNA for growth imprinting, DNA methyltransferase (DNMT) and epigenetic transcription-related genes in the liver and heart of foetal goats during gestation...
September 6, 2018: Animal Reproduction Science
Wei Shi, Shanjie Zha, Lihua Hu, Xianke Huang, Jiongming Zhang, Maocang Yan, Guangxu Liu
Although the effects of age on the reproductive performance of various invertebrates, including white shrimp Litopenaeus vannamei are increasingly well documented, the mechanisms manifesting these impacts remain poorly understood. To ascertain the mechanisms of age on reproductive performance, the sperm quality, intracellular contents of Ca2+ , insemination and hatching rates, and status of sperm apoptosis in terms of the expression of key regulatory genes were investigated in 11 and 16 month old male L. vannamei...
September 5, 2018: Animal Reproduction Science
Qian Li, Weike Shaoyong, Yu Li, Meijie Chen, YaMei Hu, Bin Liu, GongShe Yang, JianHong Hu
The use of antioxidants is an important aspect in the preservation of boar semen. Oligomeric proanthocyanidins (OPC) are an effective natural antioxidants that scavenges free radicals and reactive oxygen species (ROS). This study was designed to investigate the antioxidative effect of OPC on boar semen quality during liquid preservation at 17 °C. The effects of different concentrations of OPC on sperm quality variables, antioxidant effects and fertility were analyzed in this experiment. Semen collected from six Guanzhong-Black boars and was diluted with Beltsville thawing solution (BTS)...
September 1, 2018: Animal Reproduction Science
E E Onbaşılar, Ö F Güngör, S Taban, O Ahlat, S Yalçın, E S Gebeş, I Duru, Ö Varol Avcılar
The objective of this study was to evaluate the comparison of different brown and white layers in embryonic development and uptake of nutrients in the egg. A total of 360 fertilized eggs obtained from two brown (Atak-S and Brown Nick) and two white (Atabey and Nick) layer breeders at 28 wk old. Hatching eggs from each genotype were examined on the day of setting for fresh egg analysis and then at the beginning of the embryonic day (E19) and embryonic day (E21) for egg, embryo and villus analysis. Differences in egg weight, shell percentages, relative weight of yolk and albumen, relative weight and length of embryo, villus height, some values of shell, yolk and albumen and relative chick weight in examined hybrids were significant...
August 31, 2018: Animal Reproduction Science
Paula Martinez-Ros, Susana Astiz, Empar Garcia-Rosello, Alejandro Rios-Abellan, Antonio Gonzalez-Bulnes
In the present study, there was a comparison among classical long-term progestagen (fluorogestone acetate) protocols for synchronization of estrus and ovulation (14 days; group FGA14, n = 9 ewes) and short-term protocols based on 7 days of progestagen treatment plus a dose of prostaglandin F2α at either insertion (PG-FGA7, n = 11) or removal (FGA7-PG, n = 12). There were no significant differences in the ovulation rate and progesterone secretion among treatments. The FGA7-PG group, however, had a similar percentage of ewes expressing estrous behavior than the group FGA14 (90...
August 31, 2018: Animal Reproduction Science
Thiago K Nishimura, Thiago Martins, Maria Isabel da Silva, Bruna S Lafuente, José Ricardo de Garla Maio, Mario Binelli, Guilherme Pugliesi, Arlindo Saran Netto
The working hypothesis was that supplementation with progesterone (iP4) at early diestrus increases pregnancy rates of suckled beef cows with poor body condition score (BCS) and/or in anestrus when cows are submitted to timed insemination (TAI). The time of ovulation among suckled multiparous (n = 1270) and primiparous (n = 303) Nelore cows was synchronized using an estradiol/P4-based protocol for TAI (D0). At Day ‒10, visual evaluation of BCS was performed (scale = 1-5) and animals were classified according to an ovarian activity (OA) score: (OA1) absence of CL and presence of follicles ≥ 8 mm, (OA2) absence of CL and presence of follicles < 8 mm and (OA3) presence of corpus luteum (CL)...
August 30, 2018: Animal Reproduction Science
Zahra Askarianzadeh, Mohsen Sharafi, Mohammad Amir Karimi Torshizi
There has not been as much success in the effectiveness of avian semen cryopreservation as that of mammalian semen cryopreservation. This has been attributed to the unique characteristics of poultry sperm. In the area of mammalian semen, the use of magnetized extenders has enhanced the cryo-resistance of sperm in some species. The applicability of this strategy to avian semen has not yet been evaluated. The purpose of this study was to evaluate the effects on sperm quality and fertility after magnetization of extenders and use of these extenders for cryopreservation of rooster semen...
August 30, 2018: Animal Reproduction Science
V Akbarinejad, F Gharagozlou, M Vojgani, M M Bagheri Amirabadi
Nutritional partitioning to fetal development differ among nulliparous, primiparous and multiparous cows, leading to birth of smaller calves to nulliparous and primiparous than multiparous dams. The prenatal nutritional state could influence ovarian reserve and fertility in the adult offspring. The effect of maternal parity on ovarian reserve and reproduction of female offspring, however, has not been investigated in cattle. Accordingly, a retrospective research was conducted to study reproductive variables in nulliparous- (n = 310), primiparous- (n = 236) and multiparous-born (n = 323) female offspring during the first four lactation periods in dairy cows...
August 28, 2018: Animal Reproduction Science
Han Wang, Xiangyun Li, Rongyan Zhou, Jianzhong Xi, Yanhui Wei, Lanhui Li, Zhenhong Zhang
Ovarian function, the control of which is predominantly integrated by the hypothalamic-pituitary-ovarian axis, is pivotal for maintaining reproductive efficiency in sheep. To understand the regulatory mechanism of the follicular-luteal phase transition in prolific sheep, the genome-wide expression patterns of microRNAs and genes in ovarian tissue of Small Tail Han sheep were examined during the follicular and luteal phases of the oestrous cycle. Differentially expressed genes (n = 450) were identified and a total of 139 known and 72 novel miRNAs were identified in the two libraries...
August 27, 2018: Animal Reproduction Science
D F Leal, M A Torres, G M Ravagnani, S M M K Martins, F V Meirelles, A F C de Andrade
Seminal plasma (SP), the fluid that surrounds the sperm cells, is known to exert substantial influence on sperm physiology. The SP has a pivotal role in sperm function in vivo, and due to its components, it functions in an ambiguous manner in vitro, simultaneously possessing deleterious and beneficial effects. This experiment aimed to describe the differences between the presence or absence of SP from the sperm-rich fraction on some spermatozoa characteristics (kinetics, plasma and acrosome membrane integrity, lipid peroxidation and capacitation-like changes)...
August 26, 2018: Animal Reproduction Science
A L R S Maia, F Z Brandão, J M G Souza-Fabjan, M O Veiga, M F A Balaro, L G B Siqueira, O Facó, J F Fonseca
Hydrometra is characterized by the accumulation of fluid within the uterus due to the persistence of corpus luteum. The diagnosis of this disorder occurs with an ultrasonic exam. This study evaluated uterine drainage and fertility rates in goats after the use of d-cloprostenol in association or not with Gonadotropin-releasing hormone (GnRH) treatment. Twenty Saanen goats, diagnosed with hydrometra, received three 37.5-μg doses of d-cloprostenol laterovulvarly at 10-day intervals. On D5, the goats were assigned into two groups receiving 1 mL of GnRH or saline solution intramuscularly...
August 26, 2018: Animal Reproduction Science
S R Fensterseifer, K J Austin, S P Ford, B M Alexander
Adiponectin potentially influences fetal weight by altering insulin signaling and trans-placental amino acid and glucose transporters. The objective of this study was to determine how maternal obesity influences maternal and fetal plasma concentrations of adiponectin, expression of fetal adiponectin, its receptors, and adipogenic genes at mid- and late-gestation. Blood samples and tissues were collected from obese and control multiparous pregnant ewes at day 75 or 135 of gestation. Although day of gestation or maternal obesity did not influence (P >  0...
August 26, 2018: Animal Reproduction Science
Victor José Correia Santos, Mariana Garcia Kako Rodriguez, Priscila Del Aguila da Silva, Renata Sitta Gomes Mariano, Augusto Ryonosuke Taira, Vivian Tavares de Almeida, Ricardo Andrés Ramirez Uscategui, Ricardo Perecin Nociti, Pedro Paulo Maia Teixeira, Marcus Antonio Rossi Feliciano, Wilter Ricardo Russiano Vicente
The aim in this study was to evaluate the maternal-fetal development during physiological gestation in sheep by means of ultrasonography and to predict the gestational age by mathematical formulae. Thirty Santa Inês sheep were included. Evaluations were performed weekly from the 3rd to 21st gestational week. The Shapiro test was used to determine normality of the data, and Spearman test was used for determining correlations of real or transformed measurements as gestation advanced. If there was a significant difference detected, variable adjustments and gestational weeks were tested using regression models...
August 26, 2018: Animal Reproduction Science
Haney Samir, Paul Nyametease, Kentaro Nagaoka, Gen Watanabe
The objectives of this study were to determine if there is a seasonal pattern of testicular blood flow in male Shiba goats, and ascertaining whether or not there is a relationship among changes in testicular hemodynamics and circulating testosterone (T) and estradiol (E2). Twelve sexually mature male Shiba goats (Capra hircus), aged 19.5 ± 2.5 months were used in this study. Monitoring of the changes in testicular blood flow was performed once a week for 1 year, using color spectral Doppler ultrasonography...
August 23, 2018: Animal Reproduction Science
Xiaoxiao Gao, Xiaolei Yao, Hua Yang, Kaiping Deng, Yixuan Guo, Tingting Zhang, Guomin Zhang, Feng Wang
Fibroblast growth factor 9 (FGF9) is an important signaling molecule in early gonadal development. Hu sheep are noted for reproductive precociousness and fertility. The present study was conducted to investigate the gene expression and functions of FGF9 in ovine testis steroidogenesis during sexual maturity. A 874 bp cDNA fragment of FGF9 was detected that included a 627 bp coding sequence, encoding 208 amino acids. The FGF9 amino acid sequence of sheep had high homology with this molecule of other mammalian species...
August 22, 2018: Animal Reproduction Science
Abhishek Kumar, J K Prasad, A R Mustapha, Beigh Yaqoob Amin, Omer Din, R Katiyar, G K Das, N Srivastava, Ajay Kumar, M R Verma, S K Ghosh
The objective of the present study was to investigate the effects of two different concentrations of dissolved oxygen (DO, 4 and 8) ppm in the extender on oxidative stress affecting plasma membrane integrity (PMI), mitochondrial membrane potential (MMP), and deoxyribonucleic acid (DNA) damage of bull spermatozoa following cryopreservation. For the experiment, nitrogen (N2 ) gassing of the extender for varied time intervals yielded extender with DO concentration of 4 ppm and 8 ppm (Groups II and III, respectively)...
August 22, 2018: Animal Reproduction Science
Ana Paula Rodrigues Simões, Marcus Antonio Rossi Feliciano, Marjury Cristina Maronezi, Ricardo Andres Ramirez Uscategui, Pawel Mieczyslaw Bartlewski, Vivian Tavares de Almeida, David Oh, Paloma do Espírito Santo Silva, Liege Cristina Garcia da Silva, Wilter Ricardo Russiano Vicente
Objective was to evaluate the echotexture and characteristics during terminal development of canine foetal respiratory and hepatic systems through elastographic examinations. Fifteen pregnant bitches were evaluated by ultrasonography twice daily, from the 53rd gestational day until whelping, and images obtained from 120 to 0 h before parturition were analysed. Images of foetal lungs and liver were recorded and then used for computer-assisted analyses to determine quantitative attributes. Acoustic Radiation Force Impulse (ARFI) elastographic of internal organs were classified as 'soft' (white areas) or 'hard' (dark areas) and quantitative analyses determined the mean shear wave velocities (SWV) of foetal lungs and liver...
August 22, 2018: Animal Reproduction Science
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"