Zoological Journal of the Linnean SocietyJewell PA, 1989. Factors that affect fertility in a feral population of sheep. Jewell, P. A. (1989). Factors that affect fertility in a feral population of sheep. Zoo/. J. Liizn. Soc. 95: 163-174....
梁启超评价一位历史人物:“综其大纲,不山二端:一曰军事,如购船、购械、造船、造械、筑炮台、缮船坞等是也;二曰商务,如铁路、招商局、织布局、电报局、开平煤矿、漠河金矿等是也。”该材料可为研究哪一历史内容提供素材
Any alteration that influences any of these steps will affect, to a varying degree, male fertility. Studies have shown that there may be a decline in male fertility with age, as some parameters such assperm concentrationor motility worsen. However, these changes in male fertility are not as d...
To improve awareness about the potentially modifiable factors that affect fertility and reproductive outcomes, 'Your Fertility', a fertility health promotion programme funded by the Australian Government, was established in 2011. This paper describes the development and evaluation of the reach of the ...
I had a male fertility test recently and my doctor said that my sperm count is extremely low and that it's impossible for me to impregnate my wife. I know the reason too, it's steroids. I used steroids on and off over the years for body-building. I knew before I started that stero...
应急管理局执法人员王某和刘某对当地一家火力发电企业进行执法检查过程中发现约100m左右输煤线(皮带机)未设置事故拉绳开关。依据《安全生产事故隐患排查治理暂行规定》(原国家安监总局第16号令),关于该项事故隐患分类及组织整改责任的说法正确的是()。
Although subfertility and infertility can be attributed to a range of genetic and medical perturbations, research suggests that specific dietary factors can impact upon fertility status. The aim of this paper is to give an overview on how dietary factors can affect female fertility. Design/...
What factors can affect the quality of groundwater? What factors contribute to soil fertility? What factors affect the carrying capacity of an ecosystem? These factors may be biotic or abiotic. How does soil structure affect the characteristics of soil?
Factors that affect BPNS include physical condition, the number of children, satisfaction with children's marriage, employment and income, retirement, gender, monthly personal income, and self-care have statistical differences (P < 0.05). Factors that affect MHQ include physical condition, the ...
This chapter discusses in detail the various factors that affect women's fecundability. Some of these factors are frequency and timing of sexual intercourse, age, lactation, nutrition and exercise, and obesity and body weight distribution. Some lifestyle factors like cigarette smoking also affect ...