A typical pregnancy lasts approximately 280 days (around 40 weeks) from the first day of the last menstrual period (LMP) before conception. However, the estimated due date (EDD) can sometimes change, and in some cases, an ultrasound may estimate the due date to differ by up to 2 weeks compared to the actual delivery date. In reality, very few women deliver on their exact due date.

According to statistics, only 5% of women give birth on the exact due date set by the doctor, and many first-time mothers have to wait beyond the due date to welcome their newborn. There are quite a few cases where women who are 40 weeks pregnant show no signs of labor, causing restlessness for the mothers-to-be.