Guides
Plain explanations that make sense of the calculator results and answer common questions.
How the estimated due date is calculated, and how accurate it isHow the estimated due date is worked out from your last period or conception date, why it is only an estimate, and what can change it.Read the guideThe first trimester: what happens and what to doA clear guide to weeks 1 to 13: how the baby develops, common symptoms, the first visit, what to avoid and when to call the doctor.Read the guide