Douching might promote ascending infections

冲洗可能促进上行性感染发生

Early epidemiological studies , however , reported that postcoital douching was no more effective than " rhythm " or " penile withdrawal " methods , which are unreliable .

早期的流行病学调查报道，事后冲洗并不比避开排卵期或体外射精的方式更为有效，然而这些方法都是不可靠的。

Healthy women is bound to make regular vaginal douching changes the environment within the vagina , reducing their natural defense mechanisms , to the invasion of pathogenic microorganisms causing a variety of opportunity .

健康妇女经常进行阴道冲洗势必使阴道的内环境发生改变，其自然防御机能降低，给各种病原微生物入侵造成可乘之机。