Seventy-two 4-week-old pigs were randomly assigned by sex (gilts, barrows, boars) to two dietary treatments and four age periods for determinations of the effects of age, sex and Ca and P levels on the mechanical properties of various bones in swine. Pigs were individually fed diets containing either. months after the initiation of the trial. The femur (Fem), humerus (Hum), third and fourth met...