All Acronyms. ESIM - Evaporative System Integrity Monitor [Internet]; Apr 16, 2017 [cited 2017 Apr 16]. Available from: https://www.allacronyms.com/ESIM/Evaporative_System_Integrity_Monitor.
The development of the gonads is part of the prenatal development of the reproductive system and ultimately forms the testes in males and the ovaries in females. The gonads initially develop from the mesothelial layer of the peritoneum. The ovary is differentiated into a central part, the medulla, covered by a surface layer, the germinal epithelium.
The onset of puberty is normally triggered by the hypothalamus (the area of the brain that helps control pituitary gland function). It signals the pituitary gland (a pea-sized gland near the base of the brain) to release hormones that stimulate the ovaries (in girls) or testicles (in boys) to make sex hormones.