What hormone is primarily responsible for sexual changes in females during puberty?

Oestrogen is the hormone primarily responsible for sexual changes in females during puberty. It plays a critical role in the development of secondary sexual characteristics such as breast development, the widening of hips, and the regulation of the menstrual cycle. As puberty progresses, increased levels of oestrogen lead to the maturation of the female reproductive system and the development of female secondary sexual traits, preparing the body for potential reproduction.

Testosterone, while more commonly associated with male puberty, is also present in females and contributes to various bodily functions, but it is not the primary hormone responsible for the female sexual changes during this stage. Adrenaline is primarily involved in the body's fight-or-flight response and does not directly influence sexual development. Progesterone is important as well, particularly in the menstrual cycle and pregnancy, but its role comes after the initial sexual changes that oestrogen orchestrates during puberty. Thus, oestrogen is clearly the most significant hormone in bringing about the physical changes associated with female puberty.