Pregnancy Timeline Calculator

This builds the whole pregnancy as a calendar. Enter the first day of the last period with your cycle length, or the due date your clinic gave you, and it returns a table of gestational weeks 0 to 42 with the dates each one covers, the trimester it falls in and the week you are in now. The trimester and term boundaries are the fixed definitions, so early term starts at 37 weeks and the due date is 40 weeks exactly. The scan and screening rows are the usual schedule rather than your appointments, which only your clinic can give you.