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D. Blyde - One of the best experts on this subject based on the ideXlab platform.

  • Studies of male reproduction in captive African wild dogs (Lycaon pictus).
    Animal Reproduction Science, 2007
    Co-Authors: S. D. Johnston, D. Ward, J Lemon, Ian Gunn, C. A. Maccallum, Tamara Keeley, D. Blyde
    Abstract:

    Implementation of assisted breeding in the captive African wild dog is restricted by a current lack of knowledge on their reproductive physiology and the apparent difficulty of effectively manipulating the complex social dynamic of the pack in order to conduct reproductive procedures. In this study, we describe protocols for the safe and repeated capture and restraint of the African wild dog (n=7) as well as techniques for assessment of male reproductive function, semen collection and preservation. In a serendipitous finding, captive African wild dogs appeared to display significant seasonal change in male reproduction. Testicular volume and tone, Spermatorrhea and the ability to collect semen by electroejaculation all increased significantly during late summer and then subsequently declined by early spring. While there were no detectable seasonal changes in testosterone concentration in the population as whole, the alpha-dominant male in both years of the study, had a highly elevated testosterone concentration compared to subordinate males. Semen collection by electroejaculation during the late summer was most effective in peri-pubertal males (15 months) when all seven electroejaculates were of adequate quality for cryopreservation. In the second breeding season (27 months), there were numerous changes in the pack hierarchy and electroejaculation was not as successful (3/7). The characteristics of electroejaculated semen collected in the breeding season are described for seven animals including the first descriptions and incidence of sperm abnormalities in the species. Semen (n=7) was frozen using a Tris-citrate fructose buffer and final egg yolk and glycerol concentration of 20% and 4%, respectively. Sperm were loaded into 0.25 mL straws, frozen in liquid nitrogen vapor and then thawed at 37 degrees C. Initial post-thaw survival of spermatozoa was encouraging (% motile: 31.8+/-5.8%; rate: 2.8+/-0.3; % intact plasma membranes: 33.4+/-5.3% and the % of damaged acrosomes: 4.4+/-1.5%) but following 2 h incubation at 37 degrees C, post-thaw survival declined markedly.

  • Studies of male reproduction in captive African wild dogs (Lycaon pictus).
    Animal Reproduction Science, 2006
    Co-Authors: Stephen D. Johnston, D. Ward, J Lemon, Ian Gunn, C. A. Maccallum, Tamara Keeley, D. Blyde
    Abstract:

    Abstract Implementation of assisted breeding in the captive African wild dog is restricted by a current lack of knowledge on their reproductive physiology and the apparent difficulty of effectively manipulating the complex social dynamic of the pack in order to conduct reproductive procedures. In this study, we describe protocols for the safe and repeated capture and restraint of the African wild dog ( n =7) as well as techniques for assessment of male reproductive function, semen collection and preservation. In a serendipitous finding, captive African wild dogs appeared to display significant seasonal change in male reproduction. Testicular volume and tone, Spermatorrhea and the ability to collect semen by electroejaculation all increased significantly during late summer and then subsequently declined by early spring. While there were no detectable seasonal changes in testosterone concentration in the population as whole, the alpha-dominant male in both years of the study, had a highly elevated testosterone concentration compared to subordinate males. Semen collection by electroejaculation during the late summer was most effective in peri-pubertal males (15 months) when all seven electroejaculates were of adequate quality for cryopreservation. In the second breeding season (27 months), there were numerous changes in the pack hierarchy and electroejaculation was not as successful (3/7). The characteristics of electroejaculated semen collected in the breeding season are described for seven animals including the first descriptions and incidence of sperm abnormalities in the species. Semen ( n =7) was frozen using a Tris–citrate fructose buffer and final egg yolk and glycerol concentration of 20% and 4%, respectively. Sperm were loaded into 0.25mL straws, frozen in liquid nitrogen vapor and then thawed at 37°C. Initial post-thaw survival of spermatozoa was encouraging (% motile: 31.8±5.8%; rate: 2.8±0.3; % intact plasma membranes: 33.4±5.3% and the % of damaged acrosomes: 4.4±1.5%) but following 2h incubation at 37°C, post-thaw survival declined markedly.

Ma Jun - One of the best experts on this subject based on the ideXlab platform.

  • Association between physical development and Spermatorrhea during puberty among boys aged 11 to 15 years in China
    zhonghua yu fang yi xue za zhi chinese journal of preventive medicine, 2013
    Co-Authors: Meng Xiang-rui, Wang Hai-jun, Fu Lian-guo, Dong Bin, Ma Jun
    Abstract:

    To explore the association between Spermatorrhea and physical development during puberty for boys aged 11 to 15 years old in China.The height, weight, chest circumference, waist circumference, hip circumference and the station of Spermatorrhea of boys aged 11-15 years old were selected from the data of 2010 National Survey on Students Constitution and Health. Body mass index (BMI) and waist to height ratio were calculated. After 1: 1 random matching in every 0.1 year of age, 6880 boys (3440 with Spermatorrhea and 3440 without Spermatorrhea) were included in our study. t-test was used to analyze differences in anthropometry measurements between boys with Spermatorrhea and boys without Spermatorrhea in each age group. Multilevel model was used to analyze the relationship between anthropometry measurements and Spermatorrhea.A total of 6880 boys were put in this research. Heights of boys with Spermatorrhea aged 11 to 15 years old were (150.96 ± 8.01), (159.46 ± 8.03), (163.76 ± 7.43), (167.03 ± 7.12) and (169.50 ± 6.64) cm, respectively, while heights of boys without Spermatorrhea aged 11 to 15 were (147.38 ± 6.54), (153.55 ± 8.68), (160.35 ± 8.66), (164.44 ± 7.98) and (167.98 ± 7.80) cm, respectively. The differences were significant (t values were 3.70, 9.96, 10.76, 8.26, and 3.21 respectively with all P values < 0.01).of multilevel analysis showed that the differences of weight were the largest from 11 to 13 years old, boys with Spermatorrhea having a 4.20, 7.23 and 3.93 kg (Waldχ(2) values were 13.11, 70.73 and 72.93 respectively, all P values < 0.01) larger weight than boys without Spermatorrhea, respectively. Differences of height were the largest from 14 to 15 years old, boys with Spermatorrhea having a 2.81 and 1.99 cm (Waldχ(2) values were 87.80 and 19.54, P < 0.01) larger height than boys without Spermatorrhea. The trends of the differences between boys with Spermatorrhea and boys without Spermatorrhea (β value) with age were parabolic on weight, BMI, height, chest circumference, waist circumference, hip circumference and waist to height ratio. The β values reached maximum at 12 years old, which were 7.23 kg, 1.64 kg/m(2), 5.55 cm, 4.40 cm, 4.63 cm, 4.94 cm, and 0.015, respectively. The β values reached minimum at 15 years old, which were -0.39 kg, -0.56 kg/m(2), 1.99 cm, -0.57 cm, -1.59 cm, -0.42 cm and -0.015, respectively.There is an association between Spermatorrhea and physical development among boys aged 11 to 15 years in China , which has a parabolic trend with age.PubMed08695-94

  • Association between sleep duration and puberty blood pressure among students aged 9 to 17 years in China
    zhonghua yu fang yi xue za zhi chinese journal of preventive medicine, 2013
    Co-Authors: Dong Bin, Wang Hai-jun, Ma Jun
    Abstract:

    To explore the association between sleep duration and the level of puberty blood pressure of students aged 9 to 17 years in China.The data were from physical fitness and health research of chinese school students in 2010. A total of 123 919 boys aged 11 to 17 years and girls aged 9 to 17 years were included in our study, whose record of height, weight, blood pressure, sleep duration and first Spermatorrhea/menarche were performed. Students were grouped as relative enough sleep duration group and short sleep duration group by their sleep duration reported. The level of blood pressure, as well as the prevalence of high blood pressure (HBP), was compared between different sleep duration groups, and multilevel model was used and analyzed the relationship between sleep duration and blood pressure.123 919 students were surveyed in this study, including 52 549 boys and 71 370 girls. The mean blood pressure of boys was 109.41/67.05 mm Hg (1 mm Hg = 0.133 kPa), 30 830 boys (58.7%) experienced first Spermatorrhea, and 18 692 boys (35.6%) were defined as relative enough sleep duration. The mean level blood pressure of girls surveyed was 103.65/65.12 mm Hg, 46 031 girls (64.5%) experienced menarche, and 23 143 girls (32.4%) were defined as relative enough sleep duration. Among the boys without first Spermatorrhea, 7481 boys (34.4%) were defined as relative enough sleep duration, whose mean blood pressure was 105.25/65.01 mm Hg and prevalence of HBP was 4.3% (325/7481), and 14 238 boys (65.6%) were defined as short sleep duration, whose mean blood pressure was 105.9/65.27 mm Hg and prevalence of HBP was 5.6% (802/14 238), boys with relative enough sleep duration showed a significant lower blood pressure level and the prevalence of HBP compared with boys with short sleep duration (F = 15.38, P < 0.01;χ(2) = 16.55, P < 0.01). Among girls without menarche, 9311 girls (36.7%) were defined as relative enough sleep duration, whose mean blood pressure was 100.47/63.25 mm Hg and prevalence of HBP was 2.9% (271/9311), 16 028 girls (63.3%) were defined as short sleep duration, whose mean blood pressure was 101.06/63.57 mm Hg and prevalence of HBP was 3.3% (536/16 028), girls with relative enough sleep duration showed a lower level of blood pressure compared with girls with short sleep duration (F = 17.44 and 7.11, respectively, all P values < 0.01). Among girls experienced menarche, 13 832 girls (30.0%) were defined as relative enough sleep duration, whose mean blood pressure was 105.27/66.19 mm Hg and prevalence of HBP was 6.25% (864/13 832), and 32 199(70.0%) girls were defined as short sleep duration, whose mean blood pressure was 105.12/66.19 mm Hg and prevalence of HBP was 6.0% (1924/32 199), girls with relative enough sleep duration showed significant higher level of blood pressure than girls with short sleep duration (F = 5.98, P = 0.015). After adjustment of region, BMI, height, age and urban/rural area by multilevel model, the level of systolic pressure decreased 0.18 mm Hg with 1 h increase of sleep duration among boys without first Spermatorrhea (Wald χ(2) = 7.27, P = 0.007), the level of diastolic pressure decreased 0.13 mm Hg with 1 h increase of sleep duration among girls without menstruation (Wald χ(2) = 5.52, P = 0.019), and the systolic pressure and diastolic pressure increased 0.19 mm Hg and 0.14 mm Hg with 1 h increase of sleep duration among girls with menstruation, respectively (Wald χ(2) = 13.47 and 9.94, respectively, all P values < 0.01).Short sleep duration may be one of the influential factors of HBP during puberty.PubMed08718-254

Xuan Wan - One of the best experts on this subject based on the ideXlab platform.

  • Neglected tarlov cysts: A case of a tarlov cyst with Spermatorrhea.
    2020
    Co-Authors: Pan Sun, Faming Zhong, Xuan Wan
    Abstract:

    Abstract Background: Tarlov cysts are a commonly misdiagnosed condition, which can present with many rare symptoms. We report a case of a tarlov cyst with Spermatorrhea, and review the pertinent literature.Case presentation: A 42-year-old male patient had a history of Spermatorrhea for >10 years, but was incorrectly diagnosed as the patient and the doctors consistently mistook the symptoms for a genitourinary disease. Magnetic resonance imaging showed that two cysts in the sacral canal. The diagnosis was tarlov cyst. We performed surgery to remove the cyst and the symptoms of Spermatorrhea disappeared after operation.Conclusions: This case demonstrates that orthopedics and urologists should improve their understanding of tarlov cysts in order to avoid misdiagnosis and mistreatment.

Hai-jun Wang - One of the best experts on this subject based on the ideXlab platform.

  • Association between physical development and Spermatorrhea during puberty among boys aged 11 to 15 years in China
    Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine], 2013
    Co-Authors: Xiang-rui Meng, Hai-jun Wang, Bin Dong
    Abstract:

    Objective To explore the association between Spermatorrhea and physical development during puberty for boys aged 11 to 15 years old in China.Methods The height,weight,chest circumference,waist circumference,hip circumference and the station of Spermatorrhea of boys aged 11-15 years old were selected from the data of 2010 National Survey on Students Constitution and Health.Body mass index(BMI) and waist to height ratio were calculated.After 1∶1 random matching in every 0.1 year of age,6880 boys(3440 with Spermatorrhea and 3440 without Spermatorrhea) were included in our study.t-test was used to analyze differences in anthropometry measurements between boys with Spermatorrhea and boys without Spermatorrhea in each age group.Multilevel model was used to analyze the relationship between anthropometry measurements and Spermatorrhea.Results A total of 6880 boys were put in this research.Heights of boys with Spermatorrhea aged 11 to 15 years old were (150.96 ± 8.01),(159.46 ± 8.03),(163.76 ±7.43),(167.03 ±7.12) and (169.50 ±6.64) cm,respectively,while heights of boys without Spermatorrhea aged 11 to 15 were (147.38 ±6.54),(153.55 ±8.68),(160.35 ±8.66),(164.44±7.98) and (167.98 ±7.80) cm,respectively.The differences were significant (t values were 3.70,9.96,10.76,8.26,and 3.21 respectively with all P values ＜ 0.01).Results of multilevel analysis showed that the differences of weight were the largest from 11 to 13 years old,boys with Spermatorrhea having a 4.20,7.23 and 3.93 kg (Waldx2 values were 13.11,70.73 and 72.93 respectively,all P values ＜0.01) larger weight than boys without Spermatorrhea,respectively.Differences of height were the largest from 14 to 15 years old,boys with Spermatorrhea having a 2.81 and 1.99 cm (Waldx2 values were 87.80 and 19.54,P ＜0.01) larger height than boys without Spermatorrhea.The trends of the differences between boys with Spermatorrhea and boys without Spermatorrhea (β value) with age were parabolic on weight,BMI,height,chest circumference,waist circumference,hip circumference and waist to height ratio.The β values reached maximum at 12 years old,which were 7.23 kg,1.64 kg/m2,5.55 cm,4.40 cm,4.63 cm,4.94 cm,and 0.015,respectively.The β values reached minimum at 15 years old,which were-0.39 kg,-0.56 kg/m2,1.99 cm,-0.57 cm,-1.59 cm,-0.42 cm and-0.015,respectively.Conclusion There is an association between Spermatorrhea and physical development among boys aged 11 to 15 years in China,which has a parabolic trend with age. Key words: Puberty;  Models, statistical ;  Adolescent development;  Spermatorrhea; Morphology;  Multilevel analysis

  • Association between sleep duration and puberty blood pressure among students aged 9 to 17 years in China
    Zhonghua yu fang yi xue za zhi [Chinese journal of preventive medicine], 2013
    Co-Authors: Bin Dong, Hai-jun Wang
    Abstract:

    OBJECTIVE: To explore the association between sleep duration and the level of puberty blood pressure of students aged 9 to 17 years in China. METHODS: The data were from physical fitness and health research of chinese school students in 2010. A total of 123 919 boys aged 11 to 17 years and girls aged 9 to 17 years were included in our study, whose record of height, weight, blood pressure, sleep duration and first Spermatorrhea/menarche were performed. Students were grouped as relative enough sleep duration group and short sleep duration group by their sleep duration reported. The level of blood pressure, as well as the prevalence of high blood pressure (HBP), was compared between different sleep duration groups, and multilevel model was used and analyzed the relationship between sleep duration and blood pressure. RESULTS: 123 919 students were surveyed in this study, including 52 549 boys and 71 370 girls. The mean blood pressure of boys was 109.41/67.05 mm Hg (1 mm Hg = 0.133 kPa), 30 830 boys (58.7%) experienced first Spermatorrhea, and 18 692 boys (35.6%) were defined as relative enough sleep duration. The mean level blood pressure of girls surveyed was 103.65/65.12 mm Hg, 46 031 girls (64.5%) experienced menarche, and 23 143 girls (32.4%) were defined as relative enough sleep duration. Among the boys without first Spermatorrhea, 7481 boys (34.4%) were defined as relative enough sleep duration, whose mean blood pressure was 105.25/65.01 mm Hg and prevalence of HBP was 4.3% (325/7481), and 14 238 boys (65.6%) were defined as short sleep duration, whose mean blood pressure was 105.9/65.27 mm Hg and prevalence of HBP was 5.6% (802/14 238), boys with relative enough sleep duration showed a significant lower blood pressure level and the prevalence of HBP compared with boys with short sleep duration (F = 15.38, P < 0.01;χ(2) = 16.55, P < 0.01). Among girls without menarche, 9311 girls (36.7%) were defined as relative enough sleep duration, whose mean blood pressure was 100.47/63.25 mm Hg and prevalence of HBP was 2.9% (271/9311), 16 028 girls (63.3%) were defined as short sleep duration, whose mean blood pressure was 101.06/63.57 mm Hg and prevalence of HBP was 3.3% (536/16 028), girls with relative enough sleep duration showed a lower level of blood pressure compared with girls with short sleep duration (F = 17.44 and 7.11, respectively, all P values < 0.01). Among girls experienced menarche, 13 832 girls (30.0%) were defined as relative enough sleep duration, whose mean blood pressure was 105.27/66.19 mm Hg and prevalence of HBP was 6.25% (864/13 832), and 32 199(70.0%) girls were defined as short sleep duration, whose mean blood pressure was 105.12/66.19 mm Hg and prevalence of HBP was 6.0% (1924/32 199), girls with relative enough sleep duration showed significant higher level of blood pressure than girls with short sleep duration (F = 5.98, P = 0.015). After adjustment of region, BMI, height, age and urban/rural area by multilevel model, the level of systolic pressure decreased 0.18 mm Hg with 1 h increase of sleep duration among boys without first Spermatorrhea (Wald χ(2) = 7.27, P = 0.007), the level of diastolic pressure decreased 0.13 mm Hg with 1 h increase of sleep duration among girls without menstruation (Wald χ(2) = 5.52, P = 0.019), and the systolic pressure and diastolic pressure increased 0.19 mm Hg and 0.14 mm Hg with 1 h increase of sleep duration among girls with menstruation, respectively (Wald χ(2) = 13.47 and 9.94, respectively, all P values < 0.01). CONCLUSION: Short sleep duration may be one of the influential factors of HBP during puberty.

Qiu Xiu-shan - One of the best experts on this subject based on the ideXlab platform.

  • Reproductive health among secondary school students in urban Shenzhen
    Chinese Journal of School Health, 2011
    Co-Authors: Qiu Xiu-shan
    Abstract:

    Objective To explore the status of the adolescent development,reproductive health knowledge and attitudes to sex behaviors among secondary school students in Shenzhen,and to provide basis for establishing a scientific intervention model.Methods A stratified clustered sample of 938 secondary school students aged 13-18 years were surveyed,the data was analyzed by SPSS16.0.Results The average age of the first Spermatorrhea was(13.49±1.45) years and the average age of the menarche was(12.82±1.27) years.About 8.7% had sex experiences,in which there were 48.8% never adopting contraceptive measures.More than 70.0% students knew simple reproductive health knowledge correctly,10.7% students knew contraceptive knowledge correctly.They had an open attitude towards sex behaviors and premarital pregnancy,differences between boys and girls was statistically significant(P0.01).Conclusion The secondary school students in Shenzhen is commonly facing problems such as: early puberty,lack of reproductive health knowledge and an open attitude to sex behaviors,all of these call for scientific reproductive health education and related services being strengthened.