Fertility- IVF with MS

Hello, appreciate this is a bit of a niche post but worth asking I figure! Diagnosed with RRMS in 2020. On ocrevus for 1 year and latest MRI showed no disease progression. Generally my disease is under control (touch wood). I've just had a another (3rd) round of IVF due to unexplained infertility. I am 41 so age isn't on my side and everything I read says MS doesn't affect fertility... but... it's really hard to know what's causing repeated failure so I thought I'd ask if anyone else has any experience with IVF and infertility. Thanks x