Hormones, the menstrual cycle and reproduction

Table 1 shows the concentration of progesterone in the blood of an adult female during different phases of a 28-day menstrual cycle.

Days in the cycle	Progesterone concentration (nmol/L)
1–6	1.8
7–13	2.5
14–16	8.2
17–23	48.5
24–28	3.1

Describe the changes in progesterone concentration during the 28-day cycle.

[2]

Table 1 shows the concentration of progesterone in the blood of an adult female during different phases of a 28-day menstrual cycle.

Days in the cycle	Progesterone concentration (nmol/L)
1–6	1.8
7–13	2.5
14–16	8.2
17–23	48.5
24–28	3.1

Describe the changes in progesterone concentration during the 28-day cycle.

[2]

Hormones, the menstrual cycle and reproduction Questions