Do you need to know how far along you are? Not sure when you got pregnant?
Pregnancy is based on the FIRST day of your last menstrual period. It is measured in weeks. On average, your pregnancy should last around 40 weeks, or 280 days, from your last period. Once you’ve calculated your due date, you’ll not only have a goal to focus on, but you’ll be able to keep yourself healthy, monitor your baby’s development, and prepare for your baby’s arrival. An ultrasound provides additional information for calculating your due date.