5 year of infertility, 2 miscarriages

Hi

My husband tried to conceive for 5 years, fertility treatments with absolutely no luck. Then I had 2 miscarriages in a row, with no treatments whatsoever...

I am 32, my FSH is 13... so it's high for my age.

Any ideas why this would happen?

Have any of u experienced recurring miscarriages... and know the reason??