One large scale study in Maryborough, Victoria, Australia showed the prevalence of mid-frontal baldness increases.
在澳大利亚维多利亚州马里伯勒进行的一项大规模研究表明，中额秃顶的患病率呈上升趋势。
2
However, no study on the prevalence of infertility has been conducted in this area.
但是，在这个地区不曾进行过任何关于不孕症流行情况的研究。
3
There are no reliable global prevalence figures, but a 2005 study estimated a global incidence of 0.97 per 1000 live births based on research in the United States of America (USA).