i thought that ovum life is about 24 hours(1day), sperm life is 72 hours(3 days), do the maths and get the probability. ok. i start 1st.
assume that 1 sex for each day
ovum: 3.57%(ignore it because sperm life is longer)
sperm: 10.71% (highest probability)
spm standard until here the rest i dont know
errr.......can any1 continue?

This post has been edited by thken: Feb 6 2009, 05:38 PM