Annee I am so sorry for your goodbyes... It is very very difficult to endure loss after loss.

I am wondering what tests have been done??? Remember, there is always a reason, we just don't always know what that reason is...
Have you heard of NK cells??? There is a school of thought that believes that over abundance of these nk cells is sometimes the cause of recurrent miscarriage. Treatment for this is anticoagulant therapy - often from the luteal phase and steroids.

Dr Gavin Sacks is someone who you could consult with regard to this. I lost 6 babies on the journey to having my beautiful Imogen. This was after 4 quite non eventful pregnancies and births.
After much much much research and consultation with various specialists I found an obs who would support me in using Dr Sacks regime. 3 of my babies died in the second trimester (around 15-16 weeks). When I got passed that milestone I started to let myself think that I just might bring home this baby. It was a gamble but it paid off for me. My advice to you is research. I spent long long nights learning all I could. Consult MULTIPLE obs. Present what your research tells you and choose an obs who is in there with you.

Good luck my love...