Question
Which of the following hormonal changes initiates puberty?
| A. |
Increased pulsatile GnRH secretion |
| B. |
Decreased FSH and LH |
| C. |
Increased progesterone secretion |
| D. |
Decreased estrogen levels |
Show Answer
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Correct Answer » A Explanation |
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Puberty is initiated by activation of the hypothalamic–pituitary–gonadal (HPG) axis.
True hormonal changes at puberty:
- ↑ GnRH (pulsatile secretion)
- ↑ FSH and LH
- ↑ Estrogen (girls)
- ↑ Testosterone (boys)