foods to help conception

Me and my husband have been trying to conceive for nearly 2 years. All fertility appointments have shown that we have idiopathic infertility. 
We are on the waiting list for <a href="">IVF</a> which can take about 6 months, id rather conceive naturally or at least ensure my body is the healthiest it can be. 
What foods should I eat every day or every week and what foods should I stay away from? 
TIA 😊👍