Summary
The stage when sex hormones trigger sexual maturation and reproductive capability.
In depth
Gonadotropin-releasing hormone pulses increase, FSH and LH rise, and gonads secrete sex hormones. Changes: breast development, testicular growth, growth spurt, body hair, voice change. Starts at about 8 to 13 in girls and 9 to 14 in boys.
Puberty is influenced by genes, nutrition and environment. Secondary sexual characteristics develop. Emotional and social changes accompany it.
Example: precocious puberty occurs before age 8 in girls.
Puberty is the transition to reproductive maturity, usually between ages 8 and 14 in girls and 9 and 15 in boys. The hypothalamus increases pulsatile GnRH release, causing the pituitary to secrete LH and FSH, which stimulate the gonads to produce sex hormones.
In girls, oestrogen drives breast development, widening hips, and menstruation (menarche); in boys, testosterone causes voice deepening, facial hair, muscle growth and sperm production. Both undergo a growth spurt and pubic hair growth from adrenal androgens. Timing is influenced by genes, nutrition, body fat (leptin), and environment.
Example: precocious puberty occurs when it begins unusually early.
Key idea: puberty is triggered by a change in brain signalling, not by the gonads themselves.
Frequently asked questions
What is Puberty?
The stage when sex hormones trigger sexual maturation and reproductive capability.
Which area of biology covers Puberty, and how advanced is it?
Puberty is one of the 54 topics in Reproduction & Endocrinology. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Female Reproductive System, Hormonal Control of the Menstrual Cycle, Ovulation.
Can you give an example of Puberty?
Leptin and body fat influence timing.
What should I learn before Puberty?
Puberty is a Beginner topic, so no earlier topic is required. Other Beginner topics in Reproduction & Endocrinology that pair well with it include Reproduction, Asexual Reproduction, Sexual Reproduction.
What topics are related to Puberty?
The closest topics to Puberty are Female Reproductive System, Hormonal Control of the Menstrual Cycle, Ovulation, Lactation. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Puberty?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Puberty. To practise the whole of Reproduction & Endocrinology, use the Reproduction & Endocrinology quiz.
How is Puberty different from Female Reproductive System?
Puberty: The stage when sex hormones trigger sexual maturation and reproductive capability. Female Reproductive System: Ovaries release eggs and hormones; the uterus nurtures the developing embryo. Read both side by side and note what each one explains.
How should I study Puberty step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Female Reproductive System and explain the difference aloud. Finally, take the Reproduction & Endocrinology quiz and come back to this page for any question you miss.