Pregnancy

Due Date Calculator

Calculate your estimated due date based on the first day of your last menstrual period (LMP). Shows week-by-week milestones and trimester dates.

Naegele's rule 本地运行

First day of LMP

Cycle length (days)

Based on Naegele's rule: LMP + 280 days (40 weeks). Adjusted for non-28-day cycles.

周	日期	Milestone