Support to failed IVF

My sister just went though her first cycle of IVF and failed. She had been married way longer than me and I am currently 19 weeks pregnant while she had struggled with miscarriage, IUI and now IVF. As much as it is something I cannot control, I feel kinda bad about it. I’m trying to give her and my brother-in-law as much support as I can but I always feel like it’s not enough. She has been nothing but a wonderful person for me to lean on throughout my pregnancy and she always supports me. Anything else I can do to support her? Or any advice?