Hi Tanya,
what at a great question, thank you for posting. You may already know that foods you eat today will continue to have an impact on your fertility for up to 90 days.
My best advice is to eat organic as much as financially possible, this is to reduce your intake of herbicides and pesticides, additionally, your body will benefit from the additional nutrients that organic offers.
Drink only organic milk, and use only organic dairy, non-organic dairy should be avoided as it contains hormones and antibiotics, which can lead to an increase in estrogen levels within the body.