My question is: I have problem of irregular periods. When before period I ovulate and became pregnant that time, then from next month I will get no bleeding out of periods. Does uterus generates blood of periods every month of pregnancy and instead of bleeding out as menstruation blood it accumulate inside and form placenta or help in any other way for growth of baby? Please explain this doubt clearly as it is a nightmare for me. Will the problem of irregular periods affect pregnancy even after eggs has met sperms?