Fig. 4.1 shows the concentrations of female sex hormones during the menstrual cycle. Fig. 4.1 (a) Identify, from Fig. 4.1, hormone: $$\(\mathbf{R}\)$$ ......................................................... . S. ........................................................ (b) State the day or days of the menstrual cycle shown in Fig. 4.1 when: ovulation is most likely to occur ............................................................................................ shedding of the uterine lining occurs. ................................................................................... (c) Describe how the concentration of progesterone would change during pregnancy. Give a reason for this change. ............................................................................................................................................... . ............................................................................................................................................... . ............................................................................................................................................... . ............................................................................................................................................... . ......................................................................................................................................... (d) State the sites of production of progesterone during a menstrual cycle and during pregnancy. during a menstrual cycle ....................................................................................................... during pregnancy .................................................................................................................. (e) Describe the role of FSH in the menstrual cycle. ............................................................................................................................................... . ............................................................................................................................................... . .........................................................................................................................................

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