What you’ll learn4 learning objectivesChoose one objective for a focused lesson, or study the complete topic.16.5.1Roles of testosterone and oestrogen• Describe the roles of testosterone and oestrogen in the development and regulation of secondary sexual characteristics during pubertySyllabus objective16.5.2Menstrual cycle in terms of changes• Describe the menstrual cycle in terms of changes in the ovaries and in the lining of the uterusSyllabus objective16.5.3Sites of production of oestrogen• Describe the sites of production of oestrogen and progesterone in the menstrual cycle and in pregnancySyllabus objective16.5.4Role of hormones in controlling• Explain the role of hormones in controlling the menstrual cycle and pregnancy, limited to FSH, LH, progesterone and oestrogenSyllabus objective