D3.1 Reproduction - IB Biology New Curriculum 2025

🙍🏻Precocious puberty in girls refers to the early and abnormal appearance of secondary sexual characteristics before the age of 8, or in some cases, two standard deviations below the average for their age, taking into account ethnicity, familial genetic factors, and epigenetics. 🙍🏻During this stage of puberty, the girl begins to experience bodily changes, accelerated skeletal growth, thelarche (breast development), pubic and underarm hair, acne (adrenarche), and even menstrual bleeding (mena