What are the most common reasons for late diagnosis in women of Endometriosis?

What are the most common reasons for late diagnosis in women of Endometriosis?

What makes endometriosis diagnosis be so late in United States or other parts of the world is, there is a taboo factor that is involved with respective periods and associated symptoms around periods.  Every society and in our society, the period and its associated symptoms with it are looked upon as normal.  Usually it is said when you grow up and get married, have kids, it is going to be over.  Your mother had it too, take two aspirin.  For a woman it is not easy to bring this up every time she suffers or it gets worse.  They accept it at earlier age and they think it is their destiny.  They are accepting to live with the pain.  Over the years even though it gets worse, they bury it, they hide it.

Do women of different socio-economic backgrounds have special obstacles when seeking diagnosis and treatment for Endometriosis?