Analysis of Screening Results of 1012 Sperm Donors in China: A Retrospective Cohort Study of Geographic Differences in Semen Quality

Abstract Male reproductive health has become a concern in public health, and semen quality is essential to male reproduction. To investigate the geographical differences in semen quality of sperm donors from the north and south of China, a total of 1012 sperm donors from all over China were enrolled in this work, which were divided by their residential latitude. There were statistically significant differences in sperm concentration among men from different latitudes in China(P=0.04). The sperm concentrations of people from 18°-27° north latitude were lower than those from 36°-45°, and 45°-54° (median 131, 134, 146, respectively, P=0.021[18°-27° vs. 36°-45°] and P=0.01[18°-27° vs. 45°-54°]). It was further confirmed when the samples were re-divided into 2 groups (typically north and south) that contains 667 samples. The analysis also showed a significant difference in terms of the regions to which the samples belonged (the median of the north is 134; the median of the south is 125; P =0.015). Although other sperm parameters don’t show significant change with latitude, some of them possess a strong relationship with sperm concentration (r=-0.19364, P<0.001). Specifically, we suppose that environmental pollution and mental stress due to increased population may be the main factors in the difference.

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Study of Social Capital in the North and South Neighborhoods (The Case of Sari City, Iran)

International Journal of Social Science Research ◽

10.5296/ijssr.v5i1.10386 ◽

2016 ◽

Vol 5 (1) ◽

pp. 26

Author(s):

Ghorbanali Ebrahimi ◽

Hadi Razeghimaleh ◽

Ali Babazadeh ◽

Sabah Motevalian

Keyword(s):

Social Capital ◽

Mean Value ◽

Urban Neighborhoods ◽

The South ◽

Statistical Population ◽

The North ◽

Neighborhood Social Capital ◽

Significant Difference ◽

The Difference ◽

North And South

The main objective of this study was to find answer to this question as whether there is a difference in the social capital between the North and South urban neighborhoods. The data of the current study were collected through a questionnaire. The statistical population of this study included subjects aged 18 and above, and sample size consisted of 450 people.The findings of this study indicated that there was a significant difference between North and South neighborhoods of Sari, Iran, with regard to the neighborhood social capital. This means that the mean social capital in the South of city (3.58 out of 5) was higher than that of North of city (1.78 out of 5). The difference was also true for all aspects of neighborhood social capital in North and South urban neighborhoods of Sari. Furthermore, in all aspects of neighborhood social capital, the South neighborhoods had a higher mean value than North urban neighborhoods.

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What Is the Impact of Excessive Iodine and Semen Quality in Fertile Men of China: An Association Study

10.21203/rs.3.rs-243767/v1 ◽

2021 ◽

Author(s):

Ning Wang ◽

Fang Lv ◽

Ge Yu ◽

Cuige Shi ◽

Shangming Wang ◽

...

Keyword(s):

Semen Quality ◽

Sperm Count ◽

Sperm Concentration ◽

Urinary Iodine ◽

Iodine Concentration ◽

Male Reproduction ◽

Semen Parameters ◽

Human Thyroid ◽

Urinary Iodine Concentration ◽

The Impact

Abstract Background: Iodine is an essential element for hormones synthesized by the human thyroid gland. Thyroid hormone deficiency affects all body tissues, including multiple endocrine changes that alter growth hormones, corticotrophin, glucocorticoids, and gonadal function. In many countries, subfertility is an important problem affecting about 10–15% of all couples trying to conceive. Male subfertile factors have accounted for 25–30% of all cases in their studies. The aim of this study was to study the correlation between urinary iodine concentration (UIC) and semen quality of fertile male in China.Methods: semen and urine samples were collected from males who attended a survey for the reproductive physiological constants of male and female in China. All participants were fertile and they should be free from diseases of male reproductive system and thyroid related diseases. We studied the correlation between UIC and semen quality parameters in fertile males and the effect of iodine concentration on male reproduction. Participants were divided into six groups based on UIC. We measured semen parameters and UIC. Semen parameters or time-to-pregnancy (TTP) were analyzed by Spearman correlation, linear regression and multivariable logistic regression. Results: 1089 men were recruited in the study. The mean and median age of participants were 27.46±0.12 and 27±3.88 years, respectively. UIC of 274 (25.16%) men was lower than the UIC of WHO recommended. UIC of 405 men located in the region of WHO recommended. 62.35% of them were not located in the optimal region. Semen concentration and total sperm count were found to decrease when UIC increases when the UIC≥100 ug/L. Conclusions: A male with deficient UIC or excessive UIC has more risk of lower semen quality such as sperm concentration and total sperm count. In addition, if a male with deficient UIC or excessive UIC, his wife has longer TTP than the males who had normal UIC. Deficient UIC associated with lower semen quality and TTP than excessive UIC.

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Comparison of semen characteristics between indigenous and Amo breeds cockerel of Gombe State, Nigeria

Malaysian Journal of Fundamental and Applied Sciences ◽

10.11113/mjfas.v15n2-1.1540 ◽

2019 ◽

Vol 15 (2-1) ◽

pp. 303-306

Author(s):

Tijjani Haruna Usman ◽

Saleh Mohammed Sir ◽

Ma’aruf Bashir Sani

Keyword(s):

Semen Quality ◽

Sperm Concentration ◽

Progressive Motility ◽

Indigenous Breed ◽

Normal Sperm ◽

Abnormal Sperm ◽

Significant Difference ◽

Semen Characteristics ◽

Genetically Improved ◽

Abdominal Massage

The experiment was carried out to compare the semen characteristics of indigenous and Amo strains of cockerel at poultry unit of teaching and research farm of Federal University of Kashere, Gombe State, Nigeria. Semen samples were collected from nine indigenous and nine Amo breeds of cockerel at three days interval for two weeks using abdominal massage technique. Semen samples were examined macroscopically for semen colour, pH and ejaculation volume. Then, microscopic observation was carried for sperm concentration, mass motility, progressive motility, live and dead sperms percentage, normal and abnormal sperm, all for semen characteristics. The results showed a significant difference (P ≤ 0.05) between mass motility, progressive motility, sperm concentration and head defects of 4.85 ± 0.27 to 4.37 ± 0.19, 95.13 ± 0.43 to 81.63 ± 1.15%, 4.93 ± 1.84 to 3.40 ± 1.07×109/ml and 2.96 ± 0.17 to 3.44 ± 0.12% for indigenous and Amo breeds of cockerel, respectively. There were no significant differences observed as semen colour, ejaculate volume, semen pH, live / dead normal sperm neck (mid-piece), tail defects and sperm total abnormalities were found to be 2.85 ± 0.07 to 2.00 ± 0.090.21 ± 0.17 to 0.20 ± 0.02 /ml, 88.85 ± 0.58 to 72.70 ± 0.54% /ml, 11.14 ± 0.58 to 27.29 ± 0.54%, 81.00 ± 0.78 to 66.22 ± 0.61%,9.03 ± 0.42 to 13.96 ± 0.47%, 9.70 ± to 13.00 ± 0.30 and 21.70 ± 0.59 to 30.40 ± 0.53% for the indigenous and Amo breed groups of cockerel, respectively. It was concluded that semen quality characteristics could be differed between genetically improved (Amo strain) and indigenous breed of cockerels.

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The Difference of Being Overweight or Obese between the North and South of China

10.21203/rs.3.rs-46188/v1 ◽

2020 ◽

Author(s):

Daisheng Tang ◽

Tao Bu ◽

Yahong Liu ◽

Xuefan Dong

Keyword(s):

Logistic Regression ◽

Dietary Patterns ◽

Odds Ratio ◽

Nutrition Survey ◽

High Intake ◽

Related Information ◽

The North ◽

Health Related ◽

The Difference ◽

North And South

Abstract Objectives: The geographical environment, dietary culture, food patterns, and obesity rates are substantially different between the North and South of China. Determining the geographical distribution and local dietary patterns involved in being overweight or obese is useful for designing intervention strategies. Methods: Residents between 18 and 65 years old (n=10,863) from 11 Chinese provinces (five Northern provinces and six Southern provinces) were selected to compare dietary patterns, BMI, and health-related information from the China Health and Nutrition Survey packages in 2011. Linear and logistic regression analyses were performed to assess the strength of the association among geographic variables, the obesity problem, and dietary patterns. Results: The overall prevalence of being overweight or obese was 10.51% higher in the North than in the South. Northern dietary patterns feature a high intake of wheat and soybeans, whereas Southern dietary patterns feature a high intake of rice, vegetables, meat, and poultry. The estimated coefficient of regional variables surrounding dietary score is 1.494; surrounding the odds ratio for being overweight is 1.681, whereas surrounding the odds ratio for obesity is 2.035. Multivariate logistic regression including both the variable of South–North areas and Northern dietary patterns showed a significant correlation with being overweight or obese. Conclusion: Northern areas and their local dietary patterns are more likely to contribute to being overweight or obese. These findings provide support for tracking the progression of obesity, epidemics, and policies that target the ‘‘obesogenic’’ environment, promoting opportunities for persons to access healthy dietary patterns and nutritional balance.

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Measuring the local dark matter density with LAMOST DR5 and Gaia DR2

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/staa1483 ◽

2020 ◽

Vol 495 (4) ◽

pp. 4828-4844 ◽

Cited By ~ 1

Author(s):

Rui Guo ◽

Chao Liu ◽

Shude Mao ◽

Xiang-Xiang Xue ◽

R J Long ◽

...

Keyword(s):

Dark Matter ◽

Azimuthal Angle ◽

Matter Density ◽

Dwarf Stars ◽

Dark Matter Density ◽

The North ◽

Vertical Data ◽

Data Release ◽

The Difference ◽

North And South

ABSTRACT We apply the vertical Jeans equation to the kinematics of Milky Way stars in the solar neighbourhood to measure the local dark matter density. More than 90 000 G- and K-type dwarf stars are selected from the cross-matched sample of LAMOST (Large Sky Area Multi-Object Fibre Spectroscopic Telescope) fifth data release and Gaia second data release for our analyses. The mass models applied consist of a single exponential stellar disc, a razor thin gas disc, and a constant dark matter density. We first consider the simplified vertical Jeans equation that ignores the tilt term and assumes a flat rotation curve. Under a Gaussian prior on the total stellar surface density, the local dark matter density inferred from Markov chain Monte Carlo simulations is $0.0133_{-0.0022}^{+0.0024}\ {\rm M}_{\odot }\, {\rm pc}^{-3}$. The local dark matter densities for subsamples in an azimuthal angle range of −10° < ϕ < 5° are consistent within their 1σ errors. However, the northern and southern subsamples show a large discrepancy due to plateaux in the northern and southern vertical velocity dispersion profiles. These plateaux may be the cause of the different estimates of the dark matter density between the north and south. Taking the tilt term into account has little effect on the parameter estimations and does not explain the north and south asymmetry. Taking half of the difference of σz profiles as unknown systematic errors, we then obtain consistent measurements for the northern and southern subsamples. We discuss the influence of the vertical data range, the scale height of the tracer population, the vertical distribution of stars, and the sample size on the uncertainty of the determination of the local dark matter density.

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Association between semen quality among men with different occupational exposures and risk of recurrent spontaneous abortion in island residents

Traditional Medicine and Modern Medicine ◽

10.1142/s257590001950006x ◽

2019 ◽

Vol 02 (02) ◽

pp. 49-57

Author(s):

Wenli Cao ◽

Xinyao Pan ◽

Feijun Ye ◽

Jing Zhou ◽

Zengshu Huang ◽

...

Keyword(s):

Spontaneous Abortion ◽

Semen Quality ◽

Sperm Concentration ◽

Occupational Exposures ◽

Recurrent Spontaneous Abortion ◽

Semen Parameters ◽

Control Group ◽

Effective Prevention ◽

Mechanistic Investigation ◽

Significant Difference

Objective: This study aimed to evaluate the semen quality of male adults whose spouses suffer from recurrent spontaneous abortion (RSA) in the island area, and to explore the association between RSA and occupational exposures. Methods: A total of 131 male patients were recruited and divided into two groups: spouse with recurrent spontaneous abortion group (RSA group, [Formula: see text]) and the normal fertility group (control group, [Formula: see text]). Information such as height, weight and occupational exposure history of 131 men were obtained. Semen samples were collected and analyzed. Differences in semen parameters and DNA fragmentation index (DFI) between the two groups were compared. Odds ratios (ORs) and their corresponding 95% confidence intervals were calculated to evaluate the association between occupational exposures and RSA status. Results: Overall, no significant difference was found in sperm concentration, progressive motility and normal morphology rate between RSA and control groups. Only DFI was observed to be significantly higher in the RSA group. Evaluation of the receiver operating characteristic (ROC) curve showed DFI (AUC: 0.623, [Formula: see text]) could discriminate between males from the couples with RSA and without RSA. Conclusion: The analysis of conventional semen parameters could not directly reflect their influence on embryonic development, and test of integrity of the sperm DNA is of paramount importance to fully understand male fertility. It is crucial to conduct studies regarding occupational exposures and pregnancy loss and/or RSA risk, since it will provide population-level data to aid in the identification of important risk factors that warrant further mechanistic investigation, and eventually lead to effective prevention and treatment strategies.

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The growth pattern of the African tortoise Geochelone pardalis and other chelonians

Canadian Journal of Zoology ◽

10.1139/z98-225 ◽

1999 ◽

Vol 77 (2) ◽

pp. 181-193 ◽

Cited By ~ 3

Author(s):

Adrian Hailey ◽

Ian M Coulson

Keyword(s):

Growth Pattern ◽

High Growth ◽

Growth Patterns ◽

Growth Rings ◽

Frequency Distributions ◽

The North ◽

Body Sizes ◽

Biased Sex Ratio ◽

The Difference ◽

North And South

Growth rings were measured in dead African leopard tortoises, Geochelone pardalis, collected in the seasonal tropics of Zimbabwe over an 11-year period. A series of Ford-Walford plots using growth measured from annuli showed that growth fitted a logistic by mass curve best, logistic by length and Gompertz curves less well, and a Bertalanffy curve least well. The Bertalanffy curve, often fitted to growth of chelonians, is characterised by particularly high growth rates of juveniles compared with larger individuals. It is suggested that this growth pattern is likely to be found in species showing a marked decrease in diet quality with size. This hypothesis is supported by a review of growth patterns in chelonians: Bertalanffy curves are associated with an omnivorous (and thus potentially variable) diet and other growth patterns with an obligate carnivorous or herbivorous diet. Geochelone pardalis in Zimbabwe showed significant sexual size dimorphism, the mean asymptotic mass of females being 1.7 times that of males, unlike populations with larger body sizes to the north and south. Annual survival estimated from age-frequency distributions was significantly higher in males (0.80) than in females (0.72), the difference being sufficient to account for the male-biased sex ratio of live animals.

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Variation in Drosophila sensory bristle number at ‘Evolution Canyon’

Genetics Research ◽

10.1017/s0016672302005876 ◽

2002 ◽

Vol 80 (3) ◽

pp. 215-223 ◽

Cited By ~ 8

Author(s):

RICHARD F. LYMAN ◽

EVIATAR NEVO ◽

TRUDY F. C. MACKAY

Keyword(s):

Environmental Gradients ◽

Extreme Environments ◽

Geographic Scale ◽

Thermal Environments ◽

The North ◽

Relative Contribution ◽

Bristle Number ◽

Evolution Canyon ◽

The Difference ◽

North And South

‘Evolution Canyon’ on Mount Carmel, Israel, displays highly contrasting physical and biotic environments on a micro-geographic scale, and is a natural laboratory for investigating genetic responses to variable and extreme environments across species. Samples of Drosophila melanogaster and D. simulans were collected from three sites each on the north- and south-facing slopes of the canyon along altitudinal transects, and one site on the valley floor. Numbers of abdominal and sternopleural sensory bristles were recorded for each of these subpopulations in three thermal environments. In D. simulans, sternopleural bristle number exhibited micro-geographic differentiation between the north- and south-facing slopes, while abdominal bristle number was stable across subpopulations. In D. melanogaster, the magnitudes of the difference in mean sternopleural bristle number between the north- and south-facing slopes and of mean abdominal bristle number along the altitudinal gradients were both conditional on rearing temperature. Thus, the pattern of genetic variation between sites was consistent with underlying heterogeneity of genetic mechanisms for response to the same environmental gradients between traits and sibling species. In contrast, the genetic architecture of bristle number at the level of variation within populations was very similar between species for the same bristle trait, although the two traits differed in the relative contribution of genotype by temperature and genotype by sex interaction.

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Comparison of Serum Inhibin B and Follicle-Stimulating Hormone (FSH) Level between Normal and Infertile Men in Yaoundé

International Journal of Reproductive Medicine ◽

10.1155/2020/4765809 ◽

2020 ◽

Vol 2020 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Tchoula Mamiafo Corinne ◽

Pieme Constant Anatole ◽

Ngogang Yonkeu Jeanne

Keyword(s):

Semen Quality ◽

Follicle Stimulating Hormone ◽

Sperm Concentration ◽

Reproductive Hormones ◽

Inhibin B ◽

World Health ◽

Infertile Couple ◽

Male Reproductive Function ◽

Significant Difference ◽

Stimulating Hormone

Objective. Hormones play a vital role in initiating and maintaining male reproductive function. The present study explores the influence and predictive ability of two reproductive hormones on semen quality among men who were partners in an infertile couple. Design. During our cross sectional study, men were recruited from private and public hospital and laboratories for clinical evaluation of fertility status. Methods. Fresh semen samples were assessed for quality (concentration, motility and morphology) according to the 2010 World Health Organization manual and the serum levels of hormones, including follicle-stimulating hormone (FSH), Inhibin B was measured (ELISA). Results. We found a significant difference in the two groups regarding sperm concentration (p<0.0001), total sperm count (p<0.0001), progressive motility (p<0.0001), vitality (p<0.0001) and the percentage of normal forms (p=0.043). We found a strong and negative correlation between FSH and Inhibin B in the overall population, the normozoospermic reference group and the case group. Our study confirmed that Inhibin B was significantly and positively correlated with sperm concentration and leucocytes, and that FSH was negatively correlated to sperm concentration and vitality. Conclusion. Consistent with other studies, our results show strong association between semen quality and FSH and Inhibin B.

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Effect of Dietary Copper and Zinc Supplementation on Semen Quality of Murrah Bulls

Indian Journal of Animal Research ◽

10.18805/ijar.b-3887 ◽

2020 ◽

Author(s):

Abhradip Majumder ◽

Manjula Thakur ◽

Mukesh Bhakat ◽

Manorama Saha ◽

Tushar Kumar Mohanty ◽

...

Keyword(s):

Blood Plasma ◽

Seminal Plasma ◽

Semen Quality ◽

Sperm Concentration ◽

Basal Diet ◽

Sod Activity ◽

Significant Difference ◽

T1 And T2 ◽

Cu And Zn ◽

In Blood Plasma

The effect of dietary supplementation of Cu and Zn on semen quality parameters and certain bio-chemicals parameters were evaluated in Murrah bulls. Twelve mature Murrah bulls (4-6 years of age) were divided into three groups (n=4) T1, T2, and T3 based on semen volume and concentration and were fed as per ICAR standard (2013). However, the animals were supplemented with 0%, 25%, and 50% Cu and Zn above the basal diet in T1, T2 and T3 groups, respectively for 180 days. Quantitative and qualitative characteristics of semen, blood and seminal plasma antioxidant status, blood and semen minerals (Cu, Zn, Ca and Mn) were determined in experimental Murrah bulls. Semen ejaculate volume (mL) increased in T2 and T3 while sperm concentration (million/mL), intact acrosome (%), HOST reacted spermatozoa (%) increased in T3 group compared to T1 and T2 groups. No difference was observed in mass motility, pH, live spermatozoa (%) in semen sexual behaviour except dismounting time which was decreased in T3 than T1 and T2 (plessthan0.05). SOD activity in blood plasma and LPO activity decreased in seminal plasma in both T2 and T3 groups than T1, whereas catalase activity did not show any significant difference. Cu and Zn supplementation in T2 group improved plessthan0.05) Zn level in blood and seminal plasma and Cu level in blood plasma only, but not in seminal plasma. Therefore, it can be concluded that supplementation of Zn and Cu at 50% above the recommended levels of ICAR (2013) improved the qualitative and quantitative attributes of semen in Murrah bulls.

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