Anatomy & Physiology › Section Y · Reproduction and development › Topic Y.3

Development of the reproductive systems

Every embryo starts with the same set of reproductive tissues, and a short chain of genes and hormones steers them towards testicular or ovarian anatomy. The same hormonal axis then lies quiet through childhood and reawakens at puberty.

In this topic

  • One starting kit, two outcomes
  • SRY and the gonad
  • Two duct systems, one kept
  • External genitalia from shared tissue
  • Worked example: an XY fetus whose cells ignore androgens
  • Differences of sex development
  • Childhood and the trigger for puberty
  • Worked example: why gonadotropins rise
  • What affects the timing of puberty
  • Signs of puberty
  • Common mistakes to avoid
  • Key takeaways

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