【摘 要】
：
This study analyzed the effects of male age and abstinence time on semen quality and explored the best abstinence time for Chinese males among different age groups.Semen parameters,including sperm kinetics,morphology,and DNA fragmentation index(DFI),were
【机 构】
：
Center of Reproductive Medicine,Fujian Maternity and Child Health Hospital,Affiliated Hospital of Fu
论文部分内容阅读
This study analyzed the effects of male age and abstinence time on semen quality and explored the best abstinence time for Chinese males among different age groups.Semen parameters,including sperm kinetics,morphology,and DNA fragmentation index(DFI),were reviewed from 2952 men.Samples were divided into six age groups(≤25 years,26-30 years,31-35 years,36-40 years,41-45 years,and＞45 years)and were divided into six groups according to different abstinence time(2 days,3 days,4 days,5 days,6 days,and 7 days).The differences in semen quality between the groups were compared,and the effect of age and abstinence time on semen quality was analyzed.Significant differences were observed in semen volume,progressive motility(PR),and DFI among the age groups(all P＜0.05),and no significant differences were observed in sperm morphological parameters(all P＞0.05).There were significant differences in semen volume,PR,and DFI among different abstinence time groups(all P＜0.05)and no significant differences in sperm morphological parameters(all P＞0.05).Pearson analysis showed that male age and abstinence time were both significantly correlated with sperm kinetics and DFI(both P＜0.05),while no significant correlation was found with sperm morphological parameters(all P＞0.05).The box plots and histograms of men\'s age,abstinence time,and semen quality show that most semen quality parameters differ significantly between the 2 days and 7 days abstinence groups and other groups at different ages.Except for the sperm morphology parameters,sperm kinetic parameters and sperm DFI are linearly related to male age and abstinence time.
其他文献
内天井是居住类建筑的重要组成部分,本文结合产业园配套公寓的特点,以江门蓬江27号地块激光产业园配套楼建设工程为例,从相关指标及优缺点进行分析,为产业园配套公寓内天井设计提供参考.
Chlamydia trachomatis(CT)infection is the most prevalent sexually transmitted bacterial disease worldwide.However,unlike that in female infertility,the role of CT infection in male infertility remains controversial.The objective of this retrospective stud
为探究风化砂的工程性质,对水泥稳定风化砂进行了力学性能试验,研究了水泥掺量和养护龄期对其抗压强度、劈裂强度和抗压回弹模量的影响,并采用扫描电镜试验对水泥稳定风化砂的微观结构进行分析.结果表明,水泥稳定风化砂抗压强度与时间的关系可以用线性函数y=at+b表示,其中t为养护时间(d).水泥掺量达到3％及以上时,其7d无侧限抗压强度达到规范的要求.水泥的掺量对于劈裂强度的提升具有明显的作用.3％的水泥掺量对稳定风化砂前期抗压回弹模量的提高效果最为显著.SEM结果显示,水泥稳定风化砂结构更为致密,颗粒之间存在着大
采用固相法制备(1-x) N0.5Bi4.5Ti4O15-xBaTiO3 (NBT-BT,x=0,0.05,0.10,0.20,0.30,0.40)高温铋层状压电陶瓷材料.用X射线衍射(XRD)、SEM扫描电镜(SEM),介电和阻抗温谱等测试方法研究了BaTiO3掺杂量对Na0.5Bi4.5Ti4O15陶瓷晶体结构和电性能的影响;结果表明:当x≤0.20时,NBT--BT陶瓷材料为单一的铋层状结构相,居里温度Tc逐渐下降;随着BaTiO3掺杂量的增加,压电常数逐渐增大后逐渐减小,介电损耗变化趋势与之相反,
The aim of this article is to assess the outcomes of a low-intensity extracorporeal shock wave therapy(LiESWT)protocol for the treatment of Peyronie\'s disease(PD).Patients treated for PD were prospectively recorded,and data were retrospectively reviewe
The purpose of our study is to investigate the prognostic value of phosphatase and tensin homolog on chromosome 10(PTEN)expression in patients with de novo metastatic castration na?ve prostate cancer(mCNPC).A total of 205 patients with mCNPC at Fudan Univ
Semen analysis is characterized by high levels of intra-and inter-laboratory variability,due to a low level of standardization,high subjectivity of the assessments,and problems with automated procedures.To improve consistency of laboratory results,quality
Environmental factors may negatively contribute to a progressive worsening of semen quality,and differences in semen quality may result from different environmental exposures(regional differences)or lifestyle differences.Heavy metals are factors with a co
Acephalic spermatozoa syndrome is a rare type of teratozoospermia that severely impairs the reproductive ability of male patients,and genetic defects have been recognized as the main cause of acephalic spermatozoa syndrome.Spermatogenesis and centriole-as
Varicocele adversely affects semen parameters.However,the effect of varicocele repair on the sperm retrieval rate and testicular histopathological patterns in men with nonobstructive azoospermia has not been widely reported.We retrospectively assessed the