Guides
BabyData guides explain the rule behind each tool in plain English and link to the calculator that does the maths. They cover how your due date is calculated, your fertile window and ovulation, UK maternity pay and leave, and how to choose a baby name. Each guide cites its official UK source: the NHS, gov.uk and the ONS. Pregnancy content is informational only, not medical advice, and is reviewed by our editorial team against NHS and gov.uk guidance.
How your due date is calculated
Naegele’s rule, the 280-day count, and why a scan can move the date. Informational, not medical advice.
Understanding your fertile window and ovulation
When ovulation happens, the 6-day fertile window, and why cycle length matters. Informational, not medical advice.
UK maternity pay and leave explained
Statutory Maternity Pay, the 39 weeks, who qualifies and how the gov.uk rules work.
How to choose a baby name
A practical method using ONS popularity data, meanings, initials and the sibling-name test.
Editor, BabyData
Oliver Mackman is the named editor of BabyData and a director of Best Business Loans Ltd (Companies House 16833937), the company that operates the site. He is accountable for its editorial standards, sourcing and corrections, and requires every number to cite the underlying rule and the official UK dataset behind it, with pregnancy tools reviewed against NHS and gov.uk guidance before publication.
Last reviewed: 12 June 2026