HELP "Immature eggs?"

Hey has anyone been told they producing immature eggs? We have a DD (5) and have been trying for a sec9nd for over 2 years now. After 2 miscarriages and some tests we been told I may have immature eggs? WTH???? Never heard of this before. Also been told I have a 6cm growth on my ovary. Would this be a reason of our failures. I am also trying to loose weight 3 stone down and a l9ng way to go! Sigh x