3. Obstetric Calculator

Obstetric Calculator

This PatientPlus article is written for healthcare professionals so the language may be more technical than the condition leaflets. You may find the abbreviations list helpful.

Calculations from LMP Date
Enter LMP (eg 20 01 2009)
Cycle length days
 
EDD by dates
Gestation today weeks days
(corrected for cycle length)
Calculations from Obstetric Ultrasound Scan
Enter scan date (eg 20 01 2009)
Scan Gestation weeks days
 
EDD by scan
Gestation today weeks days
Provide feedback
Original Author: Dr Huw Thomas Current Version: Peer Reviewer: Hilary Cole
Last Checked: 20/02/2012 Document ID: 2531  Version: 25 © EMIS

Disclaimer: This article is for information only and should not be used for the diagnosis or treatment of medical conditions. EMIS has used all reasonable care in compiling the information but make no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. For details see our conditions.