Pregnancy Due Date Calculator
Calculate your estimated due date based on your last menstrual period. Track your pregnancy week and trimester.
Due Date and Pregnancy Timeline
The estimated due date (EDD) is calculated as 280 days (40 weeks) from the first day of your last menstrual period (LMP). Pregnancy is divided into three trimesters: Trimester 1 (weeks 1-13): major organ development, increased fatigue. Trimester 2 (weeks 14-26): quickening, visible bump, ultrasound screening. Trimester 3 (weeks 27-40): fetal growth, preparing for labor. Only about 5% of babies arrive on the exact due date—normal delivery occurs between 37-42 weeks. Factors affecting delivery date: cycle length (280 days assumes 28-day cycle), irregular cycles, and conception date if known. Regular prenatal checkups monitor fetal development and maternal health. Important milestones: Nuchal translucency (11-14 weeks), anatomy scan (18-22 weeks), glucose screening (24-28 weeks). This calculator provides an estimate; your healthcare provider will refine the due date based on ultrasound and clinical assessment. Indian pregnant women should consult qualified obstetricians regularly and follow government health guidelines for maternal and fetal care.