The effect of imposed light rhythms on semen production of Suffolk rams

1973 ◽  
Vol 81 (1) ◽  
pp. 179-188 ◽  
Author(s):  
G. Jackson ◽  
H. LL. Williams ◽  
G. Jackson ◽  
H. LL. Williams
Keyword(s):  
Regression Analysis ◽  
Treatment Period ◽  
Seminal Fluid ◽  
First Year ◽  
Artificial Light ◽  
Semen Collection ◽  
Semen Volume ◽  
Periodic Regression ◽  
Light Rhythm

SummaryThe effects of two, symmetrically opposing, light treatments on the semen of Suffolk rams were investigated over two years. The light rhythm had an amplitude of 12 h and a cycle of 24 weeks. Data on semen volume, spermatozoa concentration, total spermatozoa per ejaculate, fructose concentration, seminal fluid fructose concentration and total fructose were collected during 38 semen collection periods. During the last 20 periods libido was assessed on the interval to mounting.The effects of treatments were assessed by fitting Fourier curves with 24-week cycles to the observed fluctuation of the differences between treatments and with 52-week cycles to the means of treatments. From periodic regression analysis of the treatment differences it is concluded that the Suffolk rams were susceptible to the artificial light rhythms and that both groups adapted to the imposed rhythms. Some effects of the pretreatment photic environment appeared to persist during the first year of the treatment period. There appeared to be a lag between the fluctuations of the semen attributes resulting in a series of sequential changes.

Study time, glasses utilization and age affect quality of life among senior first-year Chinese myopia students

2021 ◽  
pp. 112067212098252
Author(s):  
Ziqian Zhu ◽  
Yan He ◽  
Jiezheng Yang ◽  
Qiaoli Li ◽  
HuanHuan Cheng ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Risk Factors ◽  
Regression Analysis ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Study Time ◽  
First Year ◽  
Normal Vision ◽  
First Year Students

Purpose: To compare the quality of life of senior first-year students with normal vision and myopia, and to explore the risk factors related to quality of life in students with myopia. Methods: In this study, 1103 senior first-year students were enrolled in ten high schools. These students were divided according to the diopter degree, with 916 myopia students and 187 normal vision students. Visual function indexes, such as naked eye vision, were measured and recorded, and social demographic indexes and the National Eye Institute 25-Item Visual Function Questionnaire (NEI VFQ-25) was used. The differences in quality of life between the two groups were compared. Multiple linear regression analysis was used to explore the possible risk factors for quality of life in myopia students. Results: In the NEI VFQ-25, the total quality of life scores of myopia students (77.06 ± 15.66) were lower than those of normal vision students (85.49 ± 12.37). The difference was statistically significant ( p = 0.007). In the correlation analysis, the total scores of quality of life in myopia students were positively correlated with wearing glasses ( p = 0.049), and were negatively correlated with study time ( p = 0.029). Multiple linear regression analysis showed that study time, wearing glasses and age were risk factors affecting quality of life in myopia students. Conclusion: Our results show that senior first-year myopia students have lower quality of life scores than students with normal vision. Study time, wearing glasses and age are risk factors for quality of life in senior first-year myopia students.

scholarly journals Once-a-day Tadalafil administration improves the spermogram parameters in fertile patients

2015 ◽  
Vol 87 (3) ◽  
pp. 210 ◽  
Author(s):  
Antonio Corvasce ◽  
Giuseppe Albino ◽  
Teresa Leonetti ◽  
Agnese Filomena Buonomo ◽  
Ettore Cirillo Marucco
Keyword(s):  
Seminal Fluid ◽  
Semen Quality ◽  
Type A ◽  
Daily Treatment ◽  
Sperm Cells ◽  
Average Increase ◽  
Once Daily ◽  
Positive Effects ◽  
Semen Volume

Objectives: We explored the safety of Tadalafil once-daily treatment for 12 week and its effects on semen quality in a clinical subpopulation of men with psychogenic erectile dysfunction (ED). Patients and Methods: Twenty-seven men, between 19 and 35 years, unaware of their fertility status, suffering from psychogenic ED were enrolled. The examination of the seminal fluid was performed twice before administration of Tadalafil and twice after three months of continuous daily administration of Tadalafil 5 mg. The volume of the seminal fluid, the concentration of sperm, the concentration of sperm with type “a+b” motility, the concentration of sperm with type “a” motility, the concentration of normal sperm were taken into consideration. The results before treatment with Tadalafil (T0) and after 3 months of treatment (T3m) were compared. Results: The administration of once-daily Tadalafil 5mg, brings to an average increase of the total number of sperm cells, both total and fast motility (type a) and the percentage of nemasperms, and to an average increase of semen volume of only 0.41 ml. These quantitative and qualitative improvements of the seminal fluid resulted statistically significant as regard motility, nemasperm percentage and seminal fluid volume. No unespected safety findings were observed. Conclusions: Tadalafil administration improves the quality of sperm cells and seminal fluid: in particular motility, percentage of nemasperms and volume of seminal fluid. We emphasize the safety of the once-daily treatment with tadalafil 5mg and the positive effects on spermatogenesis.

scholarly journals Correlation Between Ultrasonic Testicular Volume and Seminal Fluid Analysis in Men with Infertility

2021 ◽  
Vol 3 (1) ◽  
pp. 103-107
Author(s):  
Sadiq Abu ◽  
Hadijat O. Kolade-Yunusa ◽  
Terkaa Atim ◽  
F. Ehimatie Obakeye ◽  
Nuhu K. Dakum
Keyword(s):  
Sperm Motility ◽  
Teaching Hospital ◽  
Seminal Fluid ◽  
Sperm Concentration ◽  
Testicular Volume ◽  
Seminiferous Tubules ◽  
Testicular Function ◽  
Semen Volume ◽  
Significant Difference ◽  
The Mean

Background: Infertility is a major cause of marital disharmony in Nigeria because of the high premium placed on childbearing. Unfortunately, the blame is on the woman most times in Nigeria. Seminiferous tubules comprise 80-90% of testicular mass. Thus, the testicular volume is an index of spermatogenesis. Therefore, accurate testicular volume will help in assessing testicular function if there is no obstruction. This study was conducted to evaluate the correlation between testicular volume, measured by ultrasound and conventional sperm parameters (semen volume, sperm concentration, sperm motility and sperm morphology) in men with infertility presenting to Urology Division, University of Abuja Teaching Hospital, Gwagwalada Abuja. Methodology: This was a descriptive cross sectional study, male subjects with infertility presenting to University of Abuja Teaching Hospital were recruited into the study. The testicular volume of all the subjects was measured by ultrasonography. The semen samples were collected by the process of masturbation on day five of sexual abstinence and analyzed according to WHO criteria 2010. Collated data were analyzed using SPSS version 20.0. P-value<0.05 was taken as statistically significant. Results: The average total testicular volume (TTV) of men with infertility was 19.83 ml while mean testicular volume (MTV) was 10.24 ml. There was a statistically significant difference between MTV and semen volume (r=0.391, p=0.000), and sperm concentration (r=0.639, p=0.000). There was a weak and insignificant correlation between MTV and sperm motility and MTV and morphology (r=0.216, p=0.055 and r=0.076, p=0.502) respectively. Linear regression analysis showed significant impact of MTV (P<0.001) on sperm concentration with a critical MTV of ≤10ml.0 indicating poor testicular function (severe oligospermia) Conclusion: The mean ultrasonic testicular volume in men with infertility in this study was 10.24ml and there was a significant positive correlation of MTV with semen volume and sperm concentration. Although, there was correlation of MTV with sperm motility and morphology, this was not significant. The critical mean ultrasonic testicular volume indicating poor testicular function (severe oligospermia) was found to be 10ml. This study has shown that the mean ultrasonic testicular volume can be a pointer to semen volume and sperm concentration in evaluating men with infertility.

scholarly journals Evaluating the ability of semen cryopreservation of Blance Blue Belge bull cattle in Vietnam

2021 ◽  
Vol 19 (2) ◽  
pp. 237-244
Author(s):  
Nguyen Huu Duc ◽  
Pham Thu Giang ◽  
Tran Thi Binh Nguyen ◽  
Nguyen Thi Mai ◽  
Bui Dai Phong
Keyword(s):  
Sperm Motility ◽  
Sperm Concentration ◽  
Joint Stock Company ◽  
Stock Company ◽  
Cattle Breeding ◽  
Semen Cryopreservation ◽  
Semen Collection ◽  
Frozen Semen ◽  
Semen Volume ◽  
Fresh Semen

The objective of this study was to determine the semen cryopreservation capacity of BBB bulls in Hanoi-Vietnam. Research conducted on the fresh semen collected from 05 BBB bulls. Results showed that semen color was normal (milky white, ivory white, ivory yellow), semen volume ranged from 6.35 mL to 7.48 mL (P <0.05), initial motility of semen ranged from 80.53% to 82.92% (P <0.05), sperm concentration in semen  ranged from 1.02 x 109 sperms/ml to 1.12 x 109 sperms/mL (P <0.05), abnormal sperm ratio ranged from 6.45% to 8.12% (P <0.05), alive sperm ratio ranged from 76.34% to 82.97% (P <0.05), sperm motility after thawing from straw semen ranged from 71.33% to 75.92% (P<0.05). In conclusion, successfully semen collection from 05 breeding BBB bulls at Hanoi Cattle Breeding Joint Stock Company, semen samples had normal color and good quantity and quality, suitable for production of frozen semen; and semen cryopreservation of straws of the 05 bull BBB semen mentioned at -196oC, sperm motility after freezing-thawing reached the economic and technical norms of 675/2014 of the Ministry of Agriculture and Rural Development.

scholarly journals Cross Sectional Study on Exposure to BPA and Phthalates and Semen Parameters in Men Attending a Fertility Center

2020 ◽  
Vol 17 (2) ◽  
pp. 489 ◽  
Author(s):  
Lidia Caporossi ◽  
Alessandra Alteri ◽  
Giovanni Campo ◽  
Enrico Paci ◽  
Giovanna Tranfo ◽  
...  
Keyword(s):  
High Performance ◽  
Seminal Fluid ◽  
Sperm Concentration ◽  
Chemical Exposure ◽  
Cross Sectional Study ◽  
Male Reproduction ◽  
Food Storage ◽  
Semen Parameters ◽  
Cross Sectional ◽  
Semen Volume

Among the possible risk factors for male reproduction, exposure to phthalates and alkylphenols is widely documented. This study evaluated the possible association between chemical exposure and the quality of the seminal fluid of 105 subjects in a fertility clinic. The urinary levels of seven phthalate metabolites (monoethylphthalate, MEP; monobenzylphthalate, MBzP; mono n-butylphthalate, MnBP; mono-(2-ethylhexyl) phthalate, MEHP; mono(2-ethyl-5-hydroxyhexyl) phthalate, MEHHP; mono-n-octylphthalate, MnOP; mono-isononylphthalate, MiNP) and bisphenol A (BPA), were analysed by high performance liquid chromatography/tandem mass spectrometry HPLC/MS/MS. The regression analysis showed that the semen volume was positively associated with MnBP, MnOP and BPA levels while was negatively associated with MiNP levels. The sperm concentration had a significant inverse relationship with MEP levels. A negative association was found between the use of plastic containers for food storage (p = 0.037) and semen volume (3.06 vs. 2.30 mL as average values, never vs daily). A significant positive correlation emerged (p < 0.005) between the consumption of canned food and the levels of BPA (2.81 vs. 0.14 µg/g creat as average values, daily vs. never) and between the use of perfumes and levels of MEP (389.86 vs. 48.68 µg/g creat, as average values, daily vs. never). No further statistically significant associations were found, even considering the working activity. Some evidence emerged about the possible link between exposure and seminal fluid quality: further case/control or prospective studies will allow us to confirm this causality hypothesis.

scholarly journals Serum surfactant protein D as a predictive biomarker for the efficacy of pirfenidone in patients with idiopathic pulmonary fibrosis: a post-hoc analysis of the phase 3 trial in Japan

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Kimiyuki Ikeda ◽  
◽  
Hirofumi Chiba ◽  
Hirotaka Nishikiori ◽  
Arata Azuma ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Regression Analysis ◽  
Placebo Group ◽  
Idiopathic Pulmonary Fibrosis ◽  
Pulmonary Fibrosis ◽  
Treatment Period ◽  
Surfactant Protein ◽  
Phase 3 ◽  
Post Hoc Analysis ◽  
Post Hoc

Abstract Background Idiopathic pulmonary fibrosis (IPF) is a progressive, fatal disorder with a variable disease course. The recent advancement of antifibrotic therapy has increased the need for reliable and specific biomarkers. This study aimed to assess alveolar epithelial biomarkers as predictors for the efficacy of the antifibrotic drug pirfenidone. Methods We conducted a post-hoc analysis of the prospective, multicenter, randomized, placebo-controlled, phase 3 trial of pirfenidone in Japan (total, n = 267; pirfenidone, n = 163; placebo, n = 104). Logistic regression analysis was performed to extract parameters that predicted disease progression, defined by a ≥ 10% relative decline in vital capacity (VC) from baseline and/or death, at week 52. For assessment of serum surfactant protein (SP)-D, SP-A and Krebs von den Lungen (KL)-6, all patients were dichotomized by the median concentration of each biomarker at baseline to the high and low biomarker subgroups. Associations of these concentrations were examined with changes in VC at each time point from baseline up to week 52, along with progression-free survival (PFS). Additionally, the effect of pirfenidone treatment on serial longitudinal concentrations of these biomarkers were evaluated. Results In the multivariate logistic regression analysis, body mass index (BMI), %VC and SP-D in the pirfenidone group, and BMI and %VC in the placebo group were indicated as predictors of disease progression. Pirfenidone treatment reduced the decline in VC with statistical significance in the low SP-D and low SP-A subgroups over most of the treatment period, and also prolonged PFS in the low SP-D and low KL-6 subgroups. Furthermore, SP-D levels over time course were reduced in the pirfenidone group from as early as week 8 until the 52-week treatment period compared with the placebo group. Conclusions Serum SP-D was the most consistent biomarker for the efficacy of pirfenidone in the cohort trial of IPF. Serial measurements of SP-D might have a potential for application as a pharmacodynamic biomarker. Trial registration The clinical trial was registered with the Japan Pharmaceutical Information Center (JAPIC) on September 13, 2005 (registration No. JapicCTI-050121; http://Clinicaltrials.jp)

INHIBITORY EFFECTS ON GONADOTROPHIN SECRETION AND GONADAL FUNCTION IN MEN DURING CHRONIC TREATMENT WITH A POTENT STIMULATORY LUTEINIZING HORMONE-RELEASING HORMONE ANALOGUE

1979 ◽  
Vol 91 (3) ◽  
pp. 601-608 ◽  
Author(s):  
Christer Bergquist ◽  
Sven Johan Nillius ◽  
Torbjörn Bergh ◽  
Göran Skarin ◽  
Leif Wide
Keyword(s):  
Luteinizing Hormone ◽  
Treatment Period ◽  
Chronic Treatment ◽  
Seminal Fluid ◽  
Gonadal Function ◽  
Luteinizing Hormone Releasing Hormone ◽  
Healthy Men ◽  
Releasing Hormone ◽  
Gonadotrophin Secretion ◽  
Long Term Treatment

ABSTRACT Long-term treatment with the potent and long-acting stimulatory luteinizing hormone-releasing hormone (LRH) analogue D-Ser(TBU)6-EA10-LRH was given to 4 healthy men to study its effects on pituitary gonadotrophin secretion and gonadal function. Five μg of the LRH agonist was self-administered sc once daily over 17 weeks. Weekly basal blood samples were obtained for determination of follicle-stimulating hormone (FSH), luteinizing hormone (LH), prolactin (PRL) and testosterone. The gonadotrophin responses to the LRH analogue were also determined during the treatment period. LRH tests were performed after treatment. Seminal fluid specimens were collected during and after treatment. A reduction of the basal serum gonadotrophin and testosterone levels were observed during the treatment period. The FSH and LH responses to the analogue were also diminished. After discontinuation of treatment the gonadotrophin and testosterone concentrations returned to pre-treatment levels within a week. The PRL levels and the seminal fluid specimens did not show any significant changes during the study period. The results suggest that chronic treatment with D-Ser(TBU)6-EA10-LRH has an inhibitory effect on the pituitary gonadotrophin secretion in healthy men. It seems likely that the reduced testosterone level is secondary to the diminished gonadotrophin secretion.

scholarly journals Evaluation of Native Rooster Based on Breeding Value of trait of Macroscopic and Microscopic Semen Quality

2021 ◽  
Vol 16 (3) ◽  
pp. 228-232
Author(s):  
Sutiyono Sutiyono ◽  
E. Kurnianto ◽  
Sutopo Sutopo ◽  
D. K. Ariyanto ◽  
D. Samsudewa
Keyword(s):  
Data Analysis ◽  
Semen Quality ◽  
Sperm Concentration ◽  
Breeding Value ◽  
Semen Collection ◽  
Native Chicken ◽  
Semen Volume ◽  
Individual Cage ◽  
Yellowish White

The aim of this research is to a determined the breeding value of native roosters based on macroscopic and microscopic semen. Ten native roosters were used in this research. Complete individual cage, semen collection tools and substance, macroscopic and microscopic tools, and substance were used in this research. The native rooster was rested for 2 weeks. Massage techniques were used for semen collection. Parameters observed were volume, pH, color, viscosity, smell, sperm concentration, and sperm livability. The semen collection was repeated 5 times. One-way analysis of variances was used for data analysis with the tools SPSS 16. The breeding value was estimated based on primary traits of semen and calculated for each rooster to make a rank. The results showed that significant parameters (P<0,05) are semen volume and sperm concentration, while the non-significant parameters (P?0,05) are pH semen and sperm livability. Semen color is yellowish-white, semen viscosity is medium-viscous and smell is spermin. The results of breeding value rank are rooster numbers 6, 7, 5, 3, 2, 4, 8, 9, 10, and 1. The conclusion is the breeding value of Native roosters is varied. The recommendation is Native chicken breeding need to apply selection used breeding value based on semen quality.

scholarly journals Association of Depression with Sperm Quality: a Multicentre Cross-Sectional Study in China During the COVID-19 Pandemic

2021 ◽  
Author(s):  
Yongfeng Wang ◽  
Yuan Zhang ◽  
Yunyi Yang ◽  
Lihui Tu ◽  
Jigao Yang ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Regression Analysis ◽  
Linear Regression ◽  
Logistic Regression Analysis ◽  
Semen Quality ◽  
Sperm Count ◽  
World Health ◽  
Cross Sectional ◽  
Progressive Motility ◽  
Semen Volume

Abstract Background: Depression is a potential factor affecting semen quality. However, the relationship between depression and semen quality remains to be fully elucidated. We investigated the association between depression and semen quality in men during the COVID-19 pandemic.Methods: Cross‐sectional, participants completed a questionnaire assessing lifestyle factors the Patient Health Questionnaire-9 (PHQ-9) was used to evaluate the psychological depression status of subjects. Semen quality assessment implements the requirements of the fifth edition of the World Health Organization (WHO )manual ,multivariable logistic regression analysis and linear regression analysis were conducted to assess the associations between depression and semen quality.Results: Of the 896 participants, 173 were depressed (19.30%). A Linear regression model was fitted to assess the strength and significant level of the association between depressive symptoms and semen quality. After adjusting for potential confounders, depression was significantly associated with 9.27 (95% confidence interval [CI] 3.39, 15.15), 0.57(95% CI 0.27, 0.87), 62.20 (95% CI 32.93, 91.48), and 12.96 (95% CI 10.55, 15.37) reduction in sperm concentration, sperm volume, total sperm count, and progressive motility, respectively. Which are consistent with the logistic regression analysis results. The semen concentration and total sperm count were linearly correlated with depression scores, whereas the semen volume and progressive motility of sperm were nonlinearly correlated with depression scores.Conclusions: Depression were associated with lower levels of semen concentration, semen volume, total sperm count, and progressive motility, which could affect male reproductive health.

scholarly journals On the Eclipse Plumage of the Mallard (Anas platyrhyncha platyrhyncha)

1937 ◽  
Vol 14 (4) ◽  
pp. 440-447
Author(s):  
ARTHUR WALTON
Keyword(s):  
Seasonal Change ◽  
Direct Action ◽  
First Year ◽  
Artificial Light ◽  
Endocrine Organ ◽  
Feather Follicle ◽  
Second Year

The eclipse plumage of the male mallard (Anas platyrhyncha platyrhyncha) which normally appears in June and July has been produced prematurely in February and March by subjecting the birds to artificial light in addition to normal daylight. Castration of male mallards did not prevent the assumption of eclipse in the first year but did so in the second year. Regenerated tissue was not found. It is concluded that the eclipse plumage is not caused by the direct action of a testicular hormone on the feather follicle, but that removal of the testis sooner or later produces an effect on some other endocrine organ or organs which consequently ceases to be sensitive to seasonal change (light) or fails to produce the hormones which bring about eclipse.

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