See an Egg during period?

is it possible to actually see an egg in the uterine lining being expelled during your period? last time I had a period I had some clots like normal during my period and there was this little bubble in it. it was smaller than a pea. I wasn't sure if that's humanly possible to actually see one. I had never seen it before so I Googled a picture of a female egg and it looked exactly the same as in the pictures. is it possible that you can actually see and egg being shed during your period? has anyone else ever experienced this before?