How are pregnancy weeks counted, and how accurate is a due date?
A due date is a midpoint
Only a small minority of babies arrive on it, and term covers a multi-week range. Treating it as a deadline creates a lot of unnecessary stress in the final weeks.
It is genuinely useful as a reference for scheduling tests and tracking growth — just not as a prediction of one particular day.
What is worth writing down
Appointment dates and results, symptoms with their timing, and — most underrated — questions as they occur to you. Appointments are short, and it is remarkably easy to walk out having forgotten the thing you meant to ask.
Later in pregnancy clinicians often ask about patterns of fetal movement. A written record beats recollection here by a wide margin.
When to call rather than search
Any bleeding, severe or persistent pain, a noticeable change in fetal movement, severe headache with visual changes, or fever. These are not things to research online first — maternity units expect these calls and would far rather receive them.
The general rule midwives repeat is worth repeating here: if something feels wrong, call. Being reassured costs a phone call.
