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Definition of Pregnancy calendar

Medically reviewed by Min Clinic Staff | Updated: January 2026

Pregnancy calendar: A pregnancy calendar is a chronological depiction of developmental changes in a pregnant woman and her embryo/fetus during the 40-week pregnancy. Pregnancy calendars usually describe fetal development and growth besides changes in the mother's body at weekly intervals. The calendar is calculated based upon the date of the woman's last menstrual period (LMP) and include the predicted date of birth (due date), sometimes referred to as the EDC, or estimated date of confinement.