Blood inside Chicken Eggs!

[Lopez6361]

I have made folder called issues on my profile please see photos of egg there

 

[kelbel313]

What about blood on the shell? Like good drops of red blood

 

[littletmv]

What is wrong with this egg?

 

[aoixneko]

I saw an drop of blood too today and throw two of them I though it was old or something with my egg thanks for all the info... I want to ask is there some way I can avoid this happen cos it really make the egg look bad??