"This type of infertility, known as anovulatory infertility, was far more common in women who ate low-fat dairy products such as skimmed milk and low-fat yoghurt, the study found."

"Jorge Chavarro at Harvard School of Public Health in Boston, Massachusetts, US, and colleagues tracked more than 18,000 women aged between 24 and 42 with no history of infertility. Every two years over an eight-year period, the women were asked if they had tried to become pregnant, whether they had been trying for more than a year without success, and the medical reasons for any fertility problems. The women also supplied detailed information about what they consumed during this time."

"Women who ate two or more servings of low-fat dairy foods a day increased their risk of ovulation-related infertility by 85% compared with those who ate less than one serving of low-fat dairy food a week. Conversely, women who ate at least one serving of high-fat dairy food a day, such as ice cream or full-fat milk, reduced their risk of anovulatory infertility by more than 25% compared with women who consumed up to one serving a week."

"Women trying to conceive should adjust their diet, if only temporarily, Chavarro says. �They should consider changing low-fat dairy foods for high-fat dairy foods,� he says, noting that the rest of the diet could be adjusted to achieve the same overall calorific intake. �Once you are pregnant, you can always switch back.�"

"Chavarro does not know why dairy fat affects fertility in this way. Other types of fat that he and others have studied do not
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