After sperm meets ovum,the inactive nucleus starts following a particular path inside the zygote, kind of chasing rather chase a path. ThisThis path is biologically known as fertilization path (as mentioned in an article of a local magazine named "science reporter"). But my question is how the pattern of the path is determined? because I read I came to know from the article that for every individual this particular path is very specific. Is it true? If so then what does that specific path determine and why is it specific for every individual?