The concept of adaptive value, or biological function, is crucial for understanding not just what exists, but why. However, traditional ethological analysis on the species level alone is insufficient. Analysis on the cultural, social class, and individual levels is essential for understanding patterns of variability, particularly between males and females (G. E. Weisfeld, Weisfeld, & Segal, 1997). In short, interdisciplinary cooperation is needed for understanding how and why a given behavior pattern emerges. Neither genetic nor environmental determinism is consistent with the facts.

Many aspects of sexual development and sex differences in adolescence could not be addressed in this brief treatment. For further information, see C. R. Ember (1981), Schlegel and Barry (1991), and G. E. Weisfeld (1999).

Pregnancy And Childbirth

Pregnancy And Childbirth

If Pregnancy Is Something That Frightens You, It's Time To Convert Your Fear Into Joy. Ready To Give Birth To A Child? Is The New Status Hitting Your State Of Mind? Are You Still Scared To Undergo All The Pain That Your Best Friend Underwent Just A Few Days Back? Not Convinced With The Answers Given By The Experts?

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