Can 2 sperm cells fertilize one human egg?

Fertilization of one egg by two sperm is possible, but the resulting zygote is almost never viable because such a zygote would have three sets of chromosomes instead of the normal two. This condition, called triploidy, is usually incompatible with life. read more

If 2 eggs are fertilized by 2 sperm then you can have fraternal twins. If 1 egg is fertlized by 1 sperm and then divides, you get identical twins. So basically, only 1 sperm per egg. If in the rare event that 2 got in there, I doubt anything would happen because an egg can't be fertilized twice and survive. read more

This probably happens by chance in some cases, but that egg or embryo would promptly die, producing no sign that the individual was ever pregnant (in the broad sense) or harbored a fertilized egg. read more