The prevalence rates of irregular menstruation , painful menstruation , nervous before the menses , pernicious vomiting , natural abortion increased with the working age ( P < 0.05 ) .
其中月经周期紊乱、痛经、经前紧张症、恶阻、自然流产率随工龄增长而增加,并有统计学意义(P<005)。