Which of the following can delay the onset of puberty?

Which of the following can delay the onset of puberty?

• A. Stress
• B. Childhood abuse
• C. Nutritional deficiencies
• D. Lack of exercise

Answer: (C)

Puberty onset is driven by a hormonal cascade in which the brain senses the body's energy status before triggering reproductive maturation. A key signal that supports this process is leptin, produced by fat tissue. When nutrition is adequate and energy stores are sufficient, leptin helps stimulate GnRH pulses from the hypothalamus, which in turn drive the release of LH and FSH from the pituitary and promote pubertal development. If nutrition is deficient, energy stores are low, leptin levels drop, and GnRH pulsatility decreases. With less stimulation of the pituitary, the production of LH and FSH falls, and pubertal progression is delayed. This direct link between energy availability and the hormonal cascade explains why nutritional deficiencies are a reliable factor in delaying puberty. Stress or childhood abuse can disrupt development via the body's stress systems, and insufficient exercise can influence energy balance, but their effects on pubertal timing are more variable and less directly linked to the core signaling that initiates puberty.

Puberty onset is driven by a hormonal cascade in which the brain senses the body's energy status before triggering reproductive maturation. A key signal that supports this process is leptin, produced by fat tissue. When nutrition is adequate and energy stores are sufficient, leptin helps stimulate GnRH pulses from the hypothalamus, which in turn drive the release of LH and FSH from the pituitary and promote pubertal development.

If nutrition is deficient, energy stores are low, leptin levels drop, and GnRH pulsatility decreases. With less stimulation of the pituitary, the production of LH and FSH falls, and pubertal progression is delayed. This direct link between energy availability and the hormonal cascade explains why nutritional deficiencies are a reliable factor in delaying puberty.

Stress or childhood abuse can disrupt development via the body's stress systems, and insufficient exercise can influence energy balance, but their effects on pubertal timing are more variable and less directly linked to the core signaling that initiates puberty.