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.

Mentor Obstetric Calculator
Calculations from LMP Date
Please enter L.M.P (eg 20 01 2009) Cycle length: days
EDD by dates:	Gestation today: weeks days (Corrected for cycle length)
Calculations from Obstetric Ultrasound Scan
Date of scan (eg 20 01 2009) Scan Gestation weeks days
EDD by Scan:	Gestation today: weeks days

Acknowledgements

EMIS is grateful to Dr Huw Thomas for writing this article. The final copy has passed scrutiny by the independent Mentor GP reviewing team. ©EMIS 2010.
Document ID: 2531
Document Version: 24
Document Reference: bgp2374
Last Updated: 30 Jun 2009

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