Hip circumference: the horizontal circumference of the most protruding part of the hip backward. The height and hip circumference index of women is significantly higher than that of men, which is because of the hip circumference of women, not the hips. At the same height, women's hips are bigger and wider. Estrogen inhibits fat accumulation in the upper abdomen and increases fat accumulation in the buttocks and thighs.
Pear-shaped and hourglass-shaped women with thin hips and thick thighs are healthier and live longer than rectangular, apple-shaped and inverted triangular women with thin hips and thin thighs.
Pear-shaped and hourglass-shaped women and their offspring have higher cognitive ability, and the fat stored in buttocks and thighs contains omega-3 polyunsaturated fatty acids (DHA) which is indispensable for fetal brain development.