Numbers for March 30, 2006

1) Heart attack risk up to 4 times higher in pregnancy. If you get pregnant over 40, your risk of a heart attack is 30 times of that of a pregnant woman under 20.

2) In its annual April Fools' Day survey, CareerBuilder.com found 33% of workers have played a practical joke on a co-worker and 17% are planning office tricks for this year's holiday.

3)10-12% of the human population has historically preferred the left hand.