I don't believe that we have a sufficient understanding of neural physiology to provide you with an answer other than puberty.
GnRH
inhibiting the secretion of GnRH
The trigger to begin puberty is GnRH from the hypothalamus.
Follicle-stimulating hormone (FSH) secretion is primarily regulated by gonadotropin-releasing hormone (GnRH) from the hypothalamus. GnRH stimulates the release of FSH from the anterior pituitary gland. Additionally, negative feedback from sex steroids such as estrogen and testosterone can also influence FSH secretion.
The endocrine system produces hormones.
Luteinizing hormone (LH) is primarily stimulated by the release of gonadotropin-releasing hormone (GnRH) from the hypothalamus. GnRH prompts the anterior pituitary gland to secrete LH, which plays a crucial role in regulating the menstrual cycle and ovulation in females, as well as testosterone production in males. Additionally, estrogen levels can provide positive feedback to enhance LH secretion during the menstrual cycle.
Luteinizing hormone (LH) is secreted by the anterior pituitary gland. This hormone plays a crucial role in regulating the reproductive system, including stimulating ovulation in females and the production of testosterone in males. Its secretion is regulated by gonadotropin-releasing hormone (GnRH) from the hypothalamus.
GnRH, LH, FSH, inhibin, testosterone (in males), estrogens and progesterone (in females).
GnRH released from the hypothalamus triggers the start of puberty in females.
Saliva secretion is the process by which saliva is produced and released into the mouth. Examples of stimuli that can trigger saliva secretion include the sight, smell, or taste of food, as well as the act of chewing. Additionally, stress or nervousness can also lead to increased saliva secretion.
GnRH (Gonadotropin-releasing hormone) is a hormone produced by the hypothalamus in the brain. It regulates the production and release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the pituitary gland, which in turn control the release of sex hormones from the ovaries and testes. GnRH plays a crucial role in the regulation of reproductive functions in both males and females.
The hypothalamus triggers the production of certain sex hormones like luteinizing hormone (LH) and follicle-stimulating hormone (FSH) by releasing gonadotropin-releasing hormone (GnRH). These hormones then stimulate the production of testosterone in males and estrogen and progesterone in females from the testes and ovaries, respectively.