Contents: The life cycle -- The endocrine system -- The reproductive system -- Pituitary gland, hypothalamus, and pineal gland -- Thyroid and parathyroid glands -- Thymus gland -- Adrenal glands -- Ovaries and testicles -- Other endocrine tissue -- Female reproductive system -- Male reproductive system -- Puberty -- Adolescence -- The menstrual cycle -- A new life begins -- During pregnancy -- Birth and the newborn baby -- Heredity and genes -- Growth and change -- Disorders of the endocrine system -- Disorders of the reproductive system.