Read more: FAQs & context
Irregular LMP
If dating ultrasound disagrees, use ultrasound-based dates for booking later scans.
Scan booking
Enter LMP; we list common gestational-age windows as calendar dates for your diary.
Purpose, how to use it, and benefits — the interactive tool is in the card above whenever you want to jump back.
Turns your LMP into calendar ranges for dating scan, NT window, and anatomy scan booking—conversation starter with reception staff.
Enter LMP, tap Estimate scan dates, copy the table into your planner.
Reduces missed booking slots in busy NHS-style systems where appointments must be requested early.
If dating ultrasound disagrees, use ultrasound-based dates for booking later scans.