These hourglass-shaped women were found to also produce more intelligent children, which the study concludes is due to having more omega-3 fatty acids stored in their hips, which is not found as much in other shaped women.

Omega-3, which is found in oily fish, is a substance that is necessary for the proper growth of the fetus’ brain during pregnancy.

Women with larger waists, more rounded bodies, have more omega-6 stored in their waists, which was found to be less suited to brain growth, and less omega-3 stored in their hips, which is also less desirable for brain growth. Slender women, with smaller waists and hips, were found to have less omega-3 and omega-6, overall, in both hips and waists. This combination would have less affect on intelligence of the baby.

The eating of omega-3 in such fish as wild salmon, herring, mackerel, anchovies, and sardines, is also linked to a healthier life style for adults. More concentrations of omega-6 over omega-3 in the human body has been thought to produce more diseases, but that connection has not been verified. Omega-6 is found in cereals, nuts, whole-grains, vegetable oils, and eggs and poultry.

The report, which will be published the week of November 11, 2007, in the journal Evolution and Human Behavior, states that based on a study of 16,000 women and girls, females with smaller waists and bigger hips are more intelligent then females with other shapes.