(a)[4]
Using Fig. 6.1 and the figures from the list, state: the length of this menstrual cycle; the number of days menstruation lasts; the day on which ovulation is most likely to happen; one day when the uterus lining is at its thickest.
(b)[3]
Add ticks (✓) in Table 6.1 to show which changes happen in boys and which happen in girls.
(c)[1]
State the name of the hormone that causes the development of secondary sexual characteristics in girls.
(d)[1]
State where the hormone that causes the development of secondary sexual characteristics in boys is made.