Assisting pregnancy

Becky • TTC #1 for 3 years now. About to start IVF 🎉🙈
So my first cycle of clomid didn't work. After sobbing and feeling deversated we've decided we will try the 6 cycles the doctor suggested and then we will seek help privately as they then want to leave us for a year before trying anything else...
Anyway, after picking myself up I'm feeling positive for this month. I'm going to have a positive attitude. Try pre-seed again and get my body into a healthy happy place. I was just wondering if anyone knew of any foods or vitamins I could take to assist with pregnancy and implantation? 
Thanks!