In summary, we observed… an inverse association between intake of high-fat dairy foods (especially whole milk and ice cream) and this disease.
So says the study
“A Prospective Study of Dairy Foods Intake and Anovulatory Infertility,” J.E. Chavarro, J.W. Rich-Edwards, B. Rosner and W.C. Willett, Human Reproduction, vol. 22, no. 5, 2007, pp. 1–8.