Avoid all trans fats and eat more healthy unsaturated fats.
Trans fats (found primarily in foods such as commercial baked and snack foods, animal products, french fries and some margarines) increase insulin resistance.
Insulin helps move glucose from the bloodstream to the cells; resistance means it's harder to move glucose into the cells. The pancreas keeps pumping out more insulin anyway, and the result is more insulin in your bloodstream. High insulin levels cause a lot of metabolic disturbances that affect ovulation.