怀孕预产期计算器 | Pregnancy Due Date Calculator

输入你的最后一次月经日期，计算预产期。 | Enter the first day of your last menstrual period to calculate your due date.

预产期计算说明 | Due Date Calculation Information

预产期计算基于末次月经日期，采用的是常用的Naegele法则，即从末次月经第一天开始计算，加上280天（40周）。实际分娩日期可能受多种因素影响，预产期仅作为参考。 | The due date is calculated based on your last menstrual period (LMP) using Naegele's rule, which adds 280 days (40 weeks) to the first day of your LMP. Actual delivery dates may vary due to multiple factors, and the due date should be used as an estimate only.