The resulting rate of escalation would place the third attack approximately 2 months (66 days) after the second, with the fourth an estimated 52 days after that.
Recent years because the late marriage, advanced age childbirth's increase, its formation rate seemed to be the trend of escalation.
近年由于晚婚、高龄分娩的增多,其发生率似有上升趋势。
3
Malignant tumor's ratio of proportional mortality rate increased year by year, many district malignant tumor mortality rates also had the obvious trend of escalation.