This calculator is for educational use. It is believed accurate but no responsibility for accuracy of the results is accepted by the author. David J R Hutchon BSc, MB, ChB, FRCOG Consultant Gynaecologist, Memorial Hospital, Darlington, England.
You are welcome to keep this page and use the calculator off-line. I would appreciate an E-mail if you find it useful enough to do so. E-mail to me at DJRHutchon@Postmaster.co.uk 1/10/1999
Explanation of RISK and ODDS
If stillbirth occurs in 15 pregnancies out of a total of 100 the risk of still birth is 15/100 or 0.15 . The odds of a stillbirth is the ratio of the number of stillbirths to the number of live births, that is 15/85 = 0.177. Thus one can say that the risk of stillbirth is, on average, fifteen out of every hudred pregnanies. For odds, for every 15 stillbirths there will be 85 livebirths.