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.
Just before mid-cycle, the hypothalamus and pituitary gland release LH (luteinizing hormone) and FSH (follicle stimulating hormone) spikes to trigger the dominant follicle to ovulate. Estrogen levels continue to rise.