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Hormones, the menstrual cycle and reproduction

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Question 38

Table 1 shows the concentration of progesterone in a woman's blood at different stages of a standard 28-day menstrual cycle.

Table 1

Stage of the cycle (days)Average progesterone concentration (nmol/dm³)
Days 1–131.2
Day 141.5
Days 15–2234.6
Days 23–289.8

Explain why the concentration of progesterone changes significantly after day 14.

[2]

Hormones, the menstrual cycle and reproduction Questions

  1. GCSE
  2. /Biology
  3. /Hormones, the menstrual cycle and reproduction