I found this list online so I can't substantiate the validity of any of the studies quoted but it is great food for thought.
For instance, newborn babies are now getting rickets from lack of Vitamin D. While sunlight is the best source of vitamin D, most people living in Northern latitudes don't get nearly enough. The best food sources are things like oily fish, egg yolks and nuts. Irish experts say that we are not getting enough Vitamin D to sustain a healthy pregnany and breastfeeding, because of our low fat diet.
They've also discovered that two or more serving a day of low fat dairy can cause anovular infertility. Women trying to conceive should eat full fat dairy instead.
Women who are deficent in B6 find it harder to get pregnant, and are much more likely to miscarry. B6 is found in meat, oily fish, nuts and green vegetables.
There is a very weak link between blood cholesterol levels and risk of heart disease in men, but none at all in women. In two very large scale studies of older women, the women who ate the most saturated fat and had the highest cholesterol levels also had the longest life expectancy. The women who ate the least saturated fat were most likely to die.
Calcium and Vitamin K are both essential for strong bones. While you can get both in low fat foods, the body can't utilise them properly unless there is fat, ideally saturated fat, present. Supplementing bread or breakfast cereal with added calcium does absolutely nothing to improve bone density. The women who eat the most saturated fat tend to have the strongest bones.
Vitamin D, found in egg yolk, oily fish, meat, nuts etc, lowers the risk of breast cancer. Diets high in sugar and refined carbs hugely increases the rates for breast cancer.
A 12 month study of a group of overweight middle-aged women who were put on one of four different diets found that the group doing Atkins lost twice as much weight as the next best (LEARN) and three times as much as the worst (Zone). The Atkins women also improved their markers for heart disease more than the others.
Magnesium is necessary for strong bones, also for maintaining a regular heart rhythm and blood pressure, and working muscles. Breastfeeding places a huge demand on the magnesium supplies of the mother. Since it is found mostly in nuts, seeds, oily fish and cocoa, a woman on a low fat diet will have trouble meeting those demands.
PCOS (polycystic ovarian syndrome) affects 5-10% of women and is the leading cause of infertility. Best treatment it to reduce insulin resistance on a keto type diet.