出産予定日計算機
ネーゲレの法則で出産予定日を推定します。
Estimated Due Date
Sunday, March 8, 2026
2026-03-08 • Naegele: LMP + 280d (+cycle-28)
Gestational age today
66w 2d
464 days since LMP
Trimester
—
Estimated ovulation
2025-06-15
Sunday, June 15, 2025
Pregnancy timeline
End of 1st trimester2025-09-06
End of 2nd trimester2025-12-13
Due date (40w)2026-03-08
Naegele's rule: EDD = LMP + 1 year − 3 months + 7 days (≈280 days). Cycle adjustment: + (cycle−28) days. Conception method: +266 days (38 weeks). Average gestation 40w, range 37–42w. For medical decisions consult a clinician.