Pregnancy Due Date Calculator Last Menstrual Period (LMP) Conception Date Ultrasound Date First Day of Last Period: Average Cycle Length: 28 days (average)21 days (short)35 days (long)Custom… Conception Date: Ultrasound Date: Weeks at Ultrasound: Calculate Due Date Your Pregnancy Timeline Due Date: — Current Gestational Age: — Conception Date: — Trimesters: Key Pregnancy Milestones
