I. What is puberty? The time meaning the end of childhood in which the body becomes physically able to reproduce. However, at puberty, children are not emotionally or socially ready for reproduction.

II. Changes in Males and Females A.Increase in height B.Increase in perspiration C.Growth of underarm hair D.Growth of pubic hair E.Increase in size of reproductive organs

III. Secondary Sex Characteristics characteristics of adult men and women that develop during puberty. A.These changes result from male and female hormones produced by endocrine system. 1.Estrogen – hormone that affects female sexual development and menstrual cycle. 2.Testosterone – hormone that affects male sexual development.

IV. Female Secondary Sex Characteristics A.Increase in breast size B.Widening of hips C.Beginning of menstruation D.Formation of mature eggs, or ova (female reproductive cells)

V. Male Secondary Sex Characteristics A.Increase in muscle mass B.Broadening of shoulders C.Deepening of voice D.Formation of sperm (male reproductive cells)

VI. Hormones Cause Emotional Changes A.Mood swing – sudden increase of feeling caused by shifting hormone levels. B.A mood swing might cause you to feel like laughing or crying for no apparent reason. C.You cannot control hormones. D.However, you can cope with mood swings by recognizing your emotions and finding healthful ways to express and cope with them.

VII. Changing At Your Own Rate A.You are unique. Your body and mind are uniquely shaped by your heredity, your environment, and your social experiences. B.Puberty occurs at different times for everyone. C.Puberty occurs at different rates for everyone.