Asked in FBISE Biology 2022 SLO — Paper 2 2022

Following graph show the concentration changes of different hormones during menstrual cycle. Name the hormone represented by "X".

Correct answer: B. LH

  • A. FSH
  • B. LH
  • C. GnRH
  • D. Progesterone

Explanation

Hormone X shows LH. LH surges around the middle of the menstrual cycle, triggering ovulation.

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About Menstrual Cycle

The menstrual cycle covers the coordinated changes in the ovaries and uterus, including menstruation, follicular growth, ovulation and corpus luteum formation. It links follicle-stimulating hormone, luteinizing hormone, oestrogen and progesterone with endometrial changes, and distinguishes the ovarian cycle from the uterine cycle and the hormonal events of pregnancy.

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